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NDC 49502-0450-93 CIMDUO 300; 300 mg/1; mg/1 Details
CIMDUO 300; 300 mg/1; mg/1
CIMDUO is a ORAL TABLET, FILM COATED in the HUMAN PRESCRIPTION DRUG category. It is labeled and distributed by Mylan Specialty L.P.. The primary component is LAMIVUDINE; TENOFOVIR DISOPROXIL FUMARATE.
MedlinePlus Drug Summary
The combination of lamivudine and tenofovir is used along with other medications to treat HIV in adults and children. Lamivudine and tenofovir are in a class of medications called nucleoside and nucleotide reverse transcriptase inhibitors (NRTIs). They work by slowing the spread of HIV in the body. Although lamivudine and tenofovir will not cure HIV, these medications may decrease your chance of developing acquired immunodeficiency syndrome (AIDS) and HIV-related illnesses such as serious infections or cancer. Taking these medications along with practicing safer sex and making other lifestyle changes may decrease the risk of getting or transmitting the HIV virus to other people.
Related Packages: 49502-0450-93Last Updated: 11/30/2022
MedLinePlus Full Drug Details: Lamivudine and Tenofovir
Product Information
| NDC | 49502-0450 |
|---|---|
| Product ID | 49502-450_6e54ea13-a4be-4744-b1d6-e444181c0741 |
| Associated GPIs | 12109902470330 |
| GCN Sequence Number | 078224 |
| GCN Sequence Number Description | lamivudine/tenofovir disop fum TABLET 300-300 MG ORAL |
| HIC3 | W5O |
| HIC3 Description | ANTIVIRALS, HIV-SPEC, NUCLEOSIDE-NUCLEOTIDE ANALOG |
| GCN | 44512 |
| HICL Sequence Number | 044797 |
| HICL Sequence Number Description | LAMIVUDINE/TENOFOVIR DISOPROXIL FUMARATE |
| Brand/Generic | Brand |
| Proprietary Name | CIMDUO |
| Proprietary Name Suffix | n/a |
| Non-Proprietary Name | Lamivudine and Tenofovir Disoproxil Fumarate |
| Product Type | HUMAN PRESCRIPTION DRUG |
| Dosage Form | TABLET, FILM COATED |
| Route | ORAL |
| Active Ingredient Strength | 300; 300 |
| Active Ingredient Units | mg/1; mg/1 |
| Substance Name | LAMIVUDINE; TENOFOVIR DISOPROXIL FUMARATE |
| Labeler Name | Mylan Specialty L.P. |
| Pharmaceutical Class | Hepatitis B Virus Nucleoside Analog Reverse Transcriptase Inhibitor [EPC], Hepatitis B Virus Nucleoside Analog Reverse Transcriptase Inhibitor [EPC], Human Immunodeficiency Virus Nucleoside Analog Reverse Transcriptase Inhibitor [EPC], Human Immunodeficie |
| DEA Schedule | n/a |
| Marketing Category | NDA |
| Application Number | NDA022141 |
| Listing Certified Through | 2024-12-31 |
Package
Package Images
NDC 49502-0450-93 (49502045093)
| NDC Package Code | 49502-450-93 |
|---|---|
| Billing NDC | 49502045093 |
| Package | 1 BOTTLE, PLASTIC in 1 CARTON (49502-450-93) / 30 TABLET, FILM COATED in 1 BOTTLE, PLASTIC |
| Marketing Start Date | 2018-06-25 |
| NDC Exclude Flag | N |
| Pricing Information | N/A |
Standard Product Labeling (SPL)/Prescribing Information SPL a300f04d-118f-4136-aaf3-ddfd00197f86 Details
HIGHLIGHTS OF PRESCRIBING INFORMATION
CIMDUO® (lamivudine and tenofovir disoproxil fumarate) tablets, for oral use
Initial U.S. Approval: 2018
WARNING: POST TREATMENT ACUTE EXACERBATIONS OF HEPATITIS B
See full prescribing information for complete boxed warning.
- •
- Severe acute exacerbations of hepatitis B have been reported in patients who are co-infected with HBV and human immunodeficiency virus (HIV-1) and have discontinued lamivudine and tenofovir disoproxil fumarate. Monitor hepatic function closely in these patients and, if appropriate, initiate anti-hepatitis B treatment. (5.2)
INDICATIONS AND USAGE
CIMDUO is a two-drug combination of lamivudine (3TC) and tenofovir disoproxil fumarate (TDF), both nucleo(t)side reverse transcriptase inhibitors and is indicated in combination with other antiretroviral agents for the treatment of human immunodeficiency virus type 1 (HIV-1) infection in adult and pediatric patients weighing at least 35 kg. (1)
DOSAGE AND ADMINISTRATION
- •
- Testing: Prior to initiation and during treatment with CIMDUO, patients should be tested for hepatitis B virus infection, and estimated creatinine clearance, urine glucose, and urine protein should be obtained. (2.1)
- •
- Recommended dose: One tablet taken orally once daily with or without food. (2.2)
- •
- Renal Impairment: Not recommended in patients with CrCL less than 50 mL/min or patients with end-stage renal disease requiring hemodialysis. (2.3)
DOSAGE FORMS AND STRENGTHS
Tablets: 300 mg lamivudine and 300 mg tenofovir disoproxil fumarate (equivalent to 245 mg of tenofovir disoproxil). (3)
CONTRAINDICATIONS
- •
- CIMDUO is contraindicated in patients with previous hypersensitivity to any of the components of this product. (4)
WARNINGS AND PRECAUTIONS
- •
- Lactic Acidosis/Severe Hepatomegaly with Steatosis: Discontinue treatment in patients who develop symptoms or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity. (5.1)
- •
- New Onset or Worsening Renal Impairment: Can include acute renal failure and Fanconi syndrome. Assess estimated creatinine clearance before initiating treatment with tenofovir disoproxil fumarate, a component of CIMDUO. In patients at risk for renal dysfunction, assess estimated creatinine clearance, serum phosphorus, urine glucose and urine protein before initiating treatment with tenofovir and periodically during treatment. Avoid administering CIMDUO with concurrent or recent use of nephrotoxic drugs. (5.3)
- •
- Hepatic decompensation, some fatal, has occurred in HIV-1/HCV co-infected patients receiving combination antiretroviral therapy and interferon- and ribavirin-based regimens. Monitor for treatment-associated toxicities. Discontinue CIMDUO, as medically appropriate, and consider dose reduction or discontinuation of interferon alfa, ribavirin, or both. (5.4)
- •
- Pancreatitis: Use with caution in pediatric patients with a history of pancreatitis or other significant risk factors for pancreatitis. Discontinue CIMDUO as clinically appropriate. (5.5)
- •
- Decreases in Bone Mineral Density (BMD): Observed in HIV-infected patients. Consider assessment of BMD in patients with a history of pathologic fracture or other risk factors for osteoporosis or bone loss. (5.6)
- •
- Immune Reconstitution Syndrome: Observed in HIV-infected patients. May necessitate further evaluation and treatment. (5.7)
- •
- Redistribution/Accumulation of Body Fat: Observed in HIV-infected patients receiving antiretroviral combination therapy. (5.8)
- •
- Triple Nucleoside-Only Regimens: Early virologic failure has been reported in HIV-infected patients. Monitor carefully and consider treatment modification. (5.9)
ADVERSE REACTIONS
- •
- Most common adverse reactions (> 10% with CIMDUO) are headache, pain, depression, diarrhea, and rash. (6)
To report SUSPECTED ADVERSE REACTIONS, contact Mylan at 1-877-446-3679 (1-877-4-INFO-RX) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
DRUG INTERACTIONS
- •
- Atazanavir: Atazanavir should be coadministered with ritonavir when coadministered with CIMDUO. (7.2)
- •
- HIV-1 Protease Inhibitors: Monitor for evidence of tenofovir toxicity when CIMDUO is coadministrated with atazanavir/ritonavir, darunavir/ritonavir, or lopinavir/ritonavir. (7.2)
- •
- Sorbitol: Avoid chronic administration of sorbitol with CIMDUO.(7.5)
USE IN SPECIFIC POPULATIONS
- •
- Lactation: Breastfeeding not recommended due to potential for HIV transmission. (8.2)
See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.
Revised: 2/2021
Table Of Contents
FULL PRESCRIBING INFORMATION: CONTENTS*
WARNING: POST TREATMENT ACUTE EXACERBATIONS OF HEPATITIS B
1 INDICATIONS AND USAGE
2 DOSAGE AND ADMINISTRATION
2.1 Testing Prior to Initiation and During Treatment with CIMDUO
2.2 Recommended Dosage for Adult and Pediatric Patients Weighing at Least 35 kg
2.3 Not Recommended in Renal Impairment
3 DOSAGE FORMS AND STRENGTHS
4 CONTRAINDICATIONS
5 WARNINGS AND PRECAUTIONS
5.1 Lactic Acidosis and Severe Hepatomegaly with Steatosis
5.2 Severe Acute Exacerbation of Hepatitis B in Patients Coinfected with HIV-1 and HBV
5.3 New Onset or Worsening Renal Impairment
5.4 Risk of Hepatic Decompensation When Used with Interferon- and Ribavirin-Based Regimens
5.5 Pancreatitis
5.6 Bone Effects
5.7 Immune Reconstitution Syndrome
5.8 Fat Redistribution
5.9 Early Virologic Failure
6 ADVERSE REACTIONS
6.1 Clinical Trials Experience
6.2 Postmarketing Experience
7 DRUG INTERACTIONS
7.1 Drugs Affecting Renal Function
7.2 HIV-1 Protease Inhibitors
7.3 Hepatitis C Antiviral Agents
7.4 Drugs Inhibiting Organic Cation Transporters
7.5 Sorbitol
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
8.2 Lactation
8.4 Pediatric Use
8.5 Geriatric Use
8.6 Renal Impairment
10 OVERDOSAGE
11 DESCRIPTION
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
12.3 Pharmacokinetics
12.4 Microbiology
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
13.2 Animal Toxicology and/or Pharmacology
14 CLINICAL STUDIES
14.1 Clinical Efficacy in Patients with HIV-1 Infection
16 HOW SUPPLIED/STORAGE AND HANDLING
17 PATIENT COUNSELING INFORMATION
- *
- Sections or subsections omitted from the full prescribing information are not listed.
WARNING
Severe acute exacerbations of hepatitis B have been reported in patients who are co-infected with hepatitis B virus (HBV) and human immunodeficiency virus (HIV-1) and have discontinued lamivudine or tenofovir disoproxil fumarate, components of CIMDUO. Monitor hepatic function closely in these patients and, if appropriate, initiate anti-hepatitis B treatment [see Warnings and Precautions (5.2)].
1 INDICATIONS AND USAGE
2 DOSAGE AND ADMINISTRATION
2.1 Testing Prior to Initiation and During Treatment with CIMDUO
Prior to initiation of CIMDUO, test patients for hepatitis B virus infection [see Warnings and Precautions (5.2)].
It is recommended that serum creatinine, serum phosphorus, estimated creatinine clearance, urine glucose, and urine protein be assessed before initiating CIMDUO and during therapy in all patients as clinically appropriate [see Warnings and Precautions (5.3)].
2.2 Recommended Dosage for Adult and Pediatric Patients Weighing at Least 35 kg
CIMDUO is a two-drug fixed-dose combination product containing 300 mg of lamivudine (3TC) and 300 mg of tenofovir disoproxil fumarate (TDF). The recommended dosage of CIMDUO in HIV-1-infected adult and pediatric patients weighing at least 35 kg is one tablet taken orally once daily with or without food.
2.3 Not Recommended in Renal Impairment
Because CIMDUO is a fixed-dose combination tablet and cannot be dose adjusted, it is not recommended for patients with impaired renal function (creatinine clearance less than 50 mL/min) or patients with end-stage renal disease (ESRD) requiring hemodialysis [see Use in Specific Populations (8.6)].
3 DOSAGE FORMS AND STRENGTHS
4 CONTRAINDICATIONS
5 WARNINGS AND PRECAUTIONS
5.1 Lactic Acidosis and Severe Hepatomegaly with Steatosis
Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogs and other antiretrovirals. Treatment should be suspended in any patient who develops clinical or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity (which may include hepatomegaly and steatosis even in the absence of marked transaminase elevations).
5.2 Severe Acute Exacerbation of Hepatitis B in Patients Coinfected with HIV-1 and HBV
Posttreatment Exacerbations of Hepatitis
All patients with HIV-1 should be tested for the presence of chronic hepatitis B virus (HBV) before initiating antiretroviral therapy. Discontinuation of anti-HBV therapy, including 3TC and TDF, may be associated with severe acute exacerbations of hepatitis. Patients infected with HBV who discontinue CIMDUO should be closely monitored with both clinical and laboratory follow-up for at least several months after stopping treatment. If appropriate, resumption of anti-hepatitis B therapy may be warranted.
Important Differences Among Lamivudine-Containing Products
CIMDUO tablets contain a higher dose of the same active ingredient, 3TC, than EPIVIR-HBV® tablets. EPIVIR-HBV was developed for patients with chronic hepatitis B. The formulation and dosage of 3TC in EPIVIR-HBV are not appropriate for patients co-infected with HIV-1 and HBV. Safety and efficacy of 3TC have not been established for treatment of chronic hepatitis B in patients co-infected with HIV-1 and HBV.
If treatment with EPIVIR-HBV, TDF, or a tenofovir alafenamide (TAF)-containing product is prescribed for chronic hepatitis B for a patient with unrecognized or untreated HIV-1 infection, rapid emergence of HIV-1 resistance is likely to result because of the subtherapeutic dose and the inappropriateness of monotherapy HIV-1 treatment.
5.3 New Onset or Worsening Renal Impairment
TDF, a component of CIMDUO is principally eliminated by the kidney. Renal impairment, including cases of acute renal failure and Fanconi syndrome (renal tubular injury with severe hypophosphatemia), has been reported with the use of TDF [see Adverse Reactions (6.2)].
It is recommended that estimated creatinine clearance be assessed in all patients prior to initiating therapy and as clinically appropriate during therapy with TDF. In patients at risk of renal dysfunction, it is recommended that estimated creatinine clearance, serum phosphorus, urine glucose, and urine protein be assessed prior to initiation of tenofovir disoproxil fumarate, and periodically during TDF therapy.
Avoid CIMDUO with concurrent or recent use of a nephrotoxic agent (e.g., high-dose or multiple non-steroidal anti-inflammatory drugs (NSAIDs)) [see Drug Interactions (7.1)]. Cases of acute renal failure after initiation of high dose or multiple NSAIDs have been reported in HIV-infected patients with risk factors for renal dysfunction who appeared stable on TDF. Some patients required hospitalization and renal replacement therapy. Alternatives to NSAIDs should be considered, if needed, in patients at risk for renal dysfunction.
Persistent or worsening bone pain, pain in extremities, fractures and/or muscular pain or weakness may be manifestations of proximal renal tubulopathy and should prompt an evaluation of renal function in at-risk patients.
5.4 Risk of Hepatic Decompensation When Used with Interferon- and Ribavirin-Based Regimens
In vitro studies have shown ribavirin can reduce the phosphorylation of pyrimidine nucleoside analogues such as 3TC, a component of CIMDUO. Although no evidence of a pharmacokinetic or pharmacodynamic interaction (e.g., loss of HIV-1/HCV virologic suppression) was seen when ribavirin was coadministered with 3TC in HIV-1/HCV co-infected patients [see Clinical Pharmacology (12.3)], hepatic decompensation (some fatal) has occurred in HIV-1/HCV co-infected patients receiving combination antiretroviral therapy for HIV-1 and interferon alfa with or without ribavirin. Patients receiving interferon alfa with or without ribavirin and 3TC should be closely monitored for treatment-associated toxicities, especially hepatic decompensation. Discontinuation of 3TC should be considered as medically appropriate. Dose reduction or discontinuation of interferon alfa, ribavirin, or both should also be considered if worsening clinical toxicities are observed, including hepatic decompensation (e.g., Child-Pugh > 6). See the full prescribing information for interferon and ribavirin.
5.5 Pancreatitis
In pediatric patients with a history of prior antiretroviral nucleoside exposure, a history of pancreatitis, or other significant risk factors for the development of pancreatitis, 3TC, a component of CIMDUO, should be used with caution. Treatment with CIMDUO should be stopped immediately if clinical signs, symptoms, or laboratory abnormalities suggestive of pancreatitis occur [see Adverse Reactions (6.1)].
5.6 Bone Effects
Bone Mineral Density (BMD)
In clinical trials in HIV-1-infected adults, TDF was associated with slightly greater decreases in BMD and increases in biochemical markers of bone metabolism, suggesting increased bone turnover relative to comparators. Serum parathyroid hormone levels and 1,25 Vitamin D levels were also higher in subjects receiving TDF [see Adverse Reactions (6.1)].
The effects of TDF-associated changes in BMD and biochemical markers on long-term bone health and future fracture risk are unknown. Assessment of BMD should be considered for adults who have a history of pathologic bone fracture or other risk factors for osteoporosis or bone loss. Although the effect of supplementation with calcium and vitamin D was not studied, such supplementation may be beneficial for all patients. If bone abnormalities are suspected then appropriate consultation should be obtained.
Mineralization Defects
Cases of osteomalacia associated with proximal renal tubulopathy, manifested as bone pain or pain in extremities and which may contribute to fractures, have been reported in association with the use of TDF [see Adverse Reactions (6.2)]. Arthralgias and muscle pain or weakness have also been reported in cases of proximal renal tubulopathy. Hypophosphatemia and osteomalacia secondary to proximal renal tubulopathy should be considered in patients at risk of renal dysfunction who present with persistent or worsening bone or muscle symptoms while receiving products containing TDF [see Warnings and Precautions (5.3)].
5.7 Immune Reconstitution Syndrome
Immune reconstitution syndrome has been reported in HIV-infected patients treated with combination antiretroviral therapy, including 3TC and TDF. During the initial phase of combination antiretroviral treatment, patients whose immune system responds may develop an inflammatory response to indolent or residual opportunistic infections (such as Mycobacterium avium infection, cytomegalovirus, Pneumocystis jirovecii pneumonia [PCP], or tuberculosis), which may necessitate further evaluation and treatment.
Autoimmune disorders (such as Graves’ disease, polymyositis, and Guillain-Barre syndrome) have also been reported to occur in the setting of immune reconstitution; however, the time to onset is more variable, and can occur many months after initiation of treatment.
5.8 Fat Redistribution
In HIV-infected patients, redistribution/accumulation of body fat including central obesity, dorsocervical fat enlargement (buffalo hump), peripheral wasting, facial wasting, breast enlargement, and “cushingoid appearance” have been observed in patients receiving combination antiretroviral therapy. The mechanism and long-term consequences of these events are currently unknown. A causal relationship has not been established.
5.9 Early Virologic Failure
Clinical trials in HIV-infected subjects have demonstrated that certain regimens that only contain three nucleoside reverse transcriptase inhibitors (NRTI) are generally less effective than triple drug regimens containing two NRTIs in combination with either a non-nucleoside reverse transcriptase inhibitor or a HIV-1 protease inhibitor. In particular, early virological failure and high rates of resistance substitutions have been reported. Triple nucleoside regimens should therefore be used with caution. Patients on a therapy utilizing a triple nucleoside-only regimen should be carefully monitored and considered for treatment modification.
6 ADVERSE REACTIONS
The following adverse reactions are discussed in other sections of the labeling:
- •
- Lactic Acidosis/Severe Hepatomegaly with Steatosis [see Warnings and Precautions (5.1)].
- •
- Exacerbations of Hepatitis B [see Boxed Warning, Warnings and Precautions (5.2)].
- •
- New Onset or Worsening Renal Impairment [see Warnings and Precautions (5.3)].
- •
- Hepatic Decompensation in Patients Co-infected with HIV-1 and Hepatitis C [see Warnings and Precautions (5.4)].
- •
- Pancreatitis [see Warnings and Precautions (5.5)].
- •
- Decreases in Bone Mineral Density [see Warnings and Precautions (5.6)].
- •
- Immune Reconstitution Syndrome [see Warnings and Precautions (5.7)].
- •
- Fat Redistribution [see Warnings and Precautions (5.8)].
6.1 Clinical Trials Experience
Because clinical studies are conducted under widely varying conditions, the adverse reaction rates observed in clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
Lamivudine and Tenofovir Disoproxil Fumarate
Study 903 - Adverse Reactions
The most common adverse reactions seen in a double-blind comparative controlled study in which 600 treatment-naïve subjects received TDF (N = 299) or stavudine (d4T) (N = 301) in combination with 3TC and EFV for 144 weeks were mild to moderate gastrointestinal events and dizziness.
Mild adverse reactions (Grade 1) were common with a similar incidence in both arms, and included dizziness, diarrhea, and nausea. Selected moderate to severe adverse reactions are summarized in Table 1.
|
||
|
TDF + 3TC + EFV |
d4T + 3TC + EFV |
|
|
N = 299 |
N = 301 |
|
|
Body as a Whole |
||
|
Headache |
14% |
17% |
|
Pain |
13% |
12% |
|
Fever |
8% |
7% |
|
Abdominal pain |
7% |
12% |
|
Back pain |
9% |
8% |
|
Asthenia |
6% |
7% |
|
Digestive System |
||
|
Diarrhea |
11% |
13% |
|
Nausea |
8% |
9% |
|
Dyspepsia |
4% |
5% |
|
Vomiting |
5% |
9% |
|
Metabolic Disorders |
||
|
Lipodystrophy† |
1% |
8% |
|
Musculoskeletal |
||
|
Arthralgia |
5% |
7% |
|
Myalgia |
3% |
5% |
|
Nervous System |
||
|
Depression |
11% |
10% |
|
Insomnia |
5% |
8% |
|
Dizziness |
3% |
6% |
|
Peripheral neuropathy‡ |
1% |
5% |
|
Anxiety |
6% |
6% |
|
Respiratory |
||
|
Pneumonia |
5% |
5% |
|
Skin and Appendages |
||
|
Rash event§ |
18% |
12% |
Laboratory Abnormalities
With the exception of fasting cholesterol and fasting triglyceride elevations that were more common in the stavudine group (40% and 9%) compared with TDF (19% and 1%) respectively, laboratory abnormalities observed in this study occurred with similar frequency in the tenofovir disoproxil fumarate and stavudine treatment arms. A summary of Grade 3 and 4 laboratory abnormalities is provided in Table 2.
|
TDF + 3TC + EFV |
d4T + 3TC + EFV |
|
|
N = 299 |
N = 301 |
|
|
Any ≥ Grade 3 Laboratory Abnormality |
36% |
42% |
|
Fasting Cholesterol (> 240 mg/dL) |
19% |
40% |
|
Creatine Kinase (M: > 990 U/L; F: > 845 U/L) |
12% |
12% |
|
Serum Amylase (> 175 U/L) |
9% |
8% |
|
AST (M: > 180 U/L; F: > 170 U/L) |
5% |
7% |
|
ALT (M: > 215 U/L; F: > 170 U/L) |
4% |
5% |
|
Hematuria (> 100 RBC/HPF) |
7% |
7% |
|
Neutrophils (< 750/mm3) |
3% |
1% |
|
Fasting Triglycerides (> 750 mg/dL) |
1% |
9% |
Pancreatitis
Pancreatitis, which has been fatal in some cases, has been observed in antiretroviral nucleoside-experienced pediatric subjects receiving 3TC alone or in combination with other antiretroviral agents [see Warnings and Precautions (5.5)].
Changes in Bone Mineral Density
In HIV-1-infected adult subjects in Study 903, there was a significantly greater mean percentage decrease from baseline in BMD at the lumbar spine in subjects receiving TDF + 3TC + EFV (-2.2% ± 3.9) compared with subjects receiving d4T + 3TC + EFV (-1.0% ± 4.6) through 144 weeks. Changes in BMD at the hip were similar between the two treatment groups (-2.8% ± 3.5 in the TDF group vs. -2.4% ± 4.5 in the d4T group). In both groups, the majority of the reduction in BMD occurred in the first 24-48 weeks of the trial and this reduction was sustained through Week 144. Twenty-eight percent of TDF-treated subjects vs. 21% of the d4T-treated subjects lost at least 5% of BMD at the spine or 7% of BMD at the hip. Clinically relevant fractures (excluding fingers and toes) were reported in 4 subjects in the TDF group and 6 subjects in the d4T group. In addition, there were significant increases in biochemical markers of bone metabolism (serum bone-specific alkaline phosphatase, serum osteocalcin, serum C telopeptide, and urinary N telopeptide) and higher serum parathyroid hormone levels and 1,25 Vitamin D levels in the TDF group relative to the d4T group; however, except for bone-specific alkaline phosphatase, these changes resulted in values that remained within the normal range [see Warnings and Precautions (5.6)].
6.2 Postmarketing Experience
The following adverse reactions have been identified during post-approval use for each of the individual components of CIMDUO (3TC and TDF). Because these reactions are reported voluntarily from a population of unknown size, it is not always possible to reliably estimate their frequency or establish causal relationship to drug exposure. These reactions have been chosen for inclusion due to a combination of their seriousness, frequency of reporting, or potential causal connection to 3TC and TDF.
Lamivudine
Body as a Whole: redistribution/accumulation of body fat [see Warnings and Precautions (5.8)].
Endocrine and Metabolic: hyperglycemia.
General: weakness.
Hemic and Lymphatic: anemia (including pure red cell aplasia and severe anemias progressing on therapy).
Hepatic and Pancreatic: lactic acidosis and hepatic steatosis, posttreatment exacerbation of hepatitis B [see Boxed Warning, Warnings and Precautions (5.1, 5.2)].
Hypersensitivity: anaphylaxis, urticaria.
Musculoskeletal: muscle weakness, CPK elevation, rhabdomyolysis.
Skin: Alopecia, pruritus.
Tenofovir Disoproxil Fumarate
Immune System Disorders: allergic reaction, including angioedema.
Metabolism and Nutrition Disorders: lactic acidosis, hypokalemia, hypophosphatemia.
Respiratory, Thoracic, and Mediastinal Disorders: dyspnea.
Gastrointestinal Disorders: pancreatitis, increased amylase, abdominal pain.
Renal and Urinary Disorders: renal insufficiency, acute renal failure, renal failure, acute tubular necrosis, Fanconi syndrome, proximal renal tubulopathy, interstitial nephritis (including acute cases), nephrogenic diabetes insipidus, renal insufficiency, increased creatinine, proteinuria, polyuria [see Warnings and Precautions (5.3)].
Hepatobiliary Disorders: hepatic steatosis, hepatitis, increased liver enzymes (most commonly AST, ALT gamma GT).
Skin and Subcutaneous Tissue Disorders: rash.
Musculoskeletal and Connective Tissue Disorders: rhabdomyolysis, osteomalacia (manifested as bone pain and which may contribute to fractures), muscular weakness, myopathy.
General Disorders and Administration Site Conditions: asthenia.
The following adverse reactions, listed under the body system headings above, may occur as a consequence of proximal renal tubulopathy: rhabdomyolysis, osteomalacia, hypokalemia, muscular weakness, myopathy, hypophosphatemia.
7 DRUG INTERACTIONS
7.1 Drugs Affecting Renal Function
Since tenofovir is primarily eliminated by the kidneys [see Clinical Pharmacology (12.3)], coadministration of CIMDUO with drugs that reduce renal function or compete for active tubular secretion may increase serum concentrations of tenofovir and/or increase the concentrations of other renally eliminated drugs. Some examples include, but are not limited to cidofovir, acyclovir, valacyclovir, ganciclovir, valganciclovir, aminoglycosides (e.g., gentamicin), and high-dose or multiple NSAIDs [see Warnings and Precautions (5.3)].
7.2 HIV-1 Protease Inhibitors
TDF decreases the AUC and Cmin of atazanavir [see Clinical Pharmacology (12.3)]. When coadministered with CIMDUO, it is recommended that atazanavir 300 mg is given with ritonavir 100 mg. TDF should not be coadministered with atazanavir without ritonavir.
Lopinavir/ritonavir, atazanavir coadministered with ritonavir, and darunavir coadministered with ritonavir have been shown to increase tenofovir concentrations [see Clinical Pharmacology (12.3)]. Patients receiving CIMDUO concomitantly with lopinavir/ritonavir, atazanavir and ritonavir, or darunavir and ritonavir should be monitored for tenofovir-associated adverse reactions. CIMDUO should be discontinued in patients who develop tenofovir-associated adverse reactions.
7.3 Hepatitis C Antiviral Agents
Coadministration of TDF, a component of CIMDUO, and EPCLUSA® (sofosbuvir/velpatasvir) or HARVONI® (ledipasvir/sofosbuvir) has been shown to increase tenofovir exposure [see Clinical Pharmacology (12.3)].
In patients receiving TDF concomitantly with sofosbuvir/velpatasvir, monitor for adverse reactions associated with TDF.
In patients receiving CIMDUO concomitantly with ledipasvir/sofosbuvir without an HIV-1 protease inhibitor/ritonavir or an HIV-1 protease inhibitor/cobicistat combination, monitor for adverse reactions associated with tenofovir.
In patients receiving CIMDUO concomitantly with ledipasvir/sofosbuvir and an HIV-1 protease inhibitor/ritonavir or an HIV-1 protease inhibitor/cobicistat combination, consider an alternative HCV or antiretroviral therapy, as the safety of increased tenofovir concentrations in this setting has not been established. If coadministration is necessary, monitor for adverse reactions associated with tenofovir.
7.4 Drugs Inhibiting Organic Cation Transporters
3TC, a component of CIMDUO, is predominantly eliminated in the urine by active organic cationic secretion. The possibility of interactions with other drugs administered concurrently should be considered, particularly when their main route of elimination is active renal secretion via the organic cationic transport system (e.g., trimethoprim) [see Clinical Pharmacology (12.3)]. No data are available regarding interactions with other drugs that have renal clearance mechanisms similar to that of 3TC.
7.5 Sorbitol
Coadministration of single doses of 3TC and sorbitol resulted in a sorbitol dose-dependent reduction in 3TC exposures. When possible, avoid use of sorbitol-containing medicines with 3TC [see Clinical Pharmacology (12.3)].
8 USE IN SPECIFIC POPULATIONS
8.1 Pregnancy
Pregnancy Exposure Registry
There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to CIMDUO during pregnancy. Healthcare providers are encouraged to register patients by calling the Antiretroviral Pregnancy Registry (APR) at 1-800-258-4263.
Risk Summary
Available data from the APR show no difference in the risk of overall major birth defects for 3TC compared to the background rate for major birth defects of 2.7% in the U.S. reference population of the Metropolitan Atlanta Congenital Defects Program (MACDP) (see Data).
3TC produced embryonic toxicity in rabbits at a dose that produced similar human exposures as the recommended clinical dose. The relevance of animal findings to human pregnancy registry data is not known. There are no adequate and well-controlled studies with TDF in pregnant women. Because animal reproduction studies are not always predictive of human response, TDF should be used during pregnancy only if clearly needed.
Human Data
Lamivudine
Based on prospective reports from the APR of over 11,000 exposures to 3TC during pregnancy resulting in live births (including over 4,300 exposed in the first trimester), there was no difference between 3TC and overall birth defects compared with the background birth defect rate of 2.7% in the U.S. reference population of the MACDP. The prevalence of defects in the first trimester was 3.1% (95% CI: 2.6% to 3.7%).
3TC pharmacokinetics were studied in pregnant women during 2 clinical trials conducted in South Africa. The trials assessed pharmacokinetics in 16 women at 36 weeks gestation using 150 mg 3TC twice daily with zidovudine, 10 women at 38 weeks gestation using 150 mg 3TC twice daily with zidovudine, and 10 women at 38 weeks gestation using 3TC 300 mg twice daily without other antiretrovirals. These trials were not designed or powered to provide efficacy information.
3TC pharmacokinetics in pregnant women were similar to those seen in non-pregnant adults and in postpartum women. 3TC concentrations were generally similar in maternal, neonatal, and umbilical cord serum samples. In a subset of subjects, amniotic fluid specimens were collected following natural rupture of membranes and confirmed that lamivudine crosses the placenta in humans. Amniotic fluid concentrations of lamivudine were typically 2 times greater than maternal serum levels and ranged from 1.2 to 2.5 mcg per mL (150 mg twice daily) and 2.1 to 5.2 mcg per mL (300 mg twice daily).
Animal Data
Lamivudine
Studies in pregnant rats showed that 3TC is transferred to the fetus through the placenta. Reproduction studies with orally administered 3TC have been performed in rats and rabbits at doses producing plasma levels up to approximately 35 times that for the recommended adult HIV dose. No evidence of teratogenicity due to 3TC was observed. Evidence of embryo-lethality was seen in the rabbit at exposure levels similar to those observed in humans but there was no indication of this effect in the rat at exposure levels up to 35 times those in humans.
8.2 Lactation
The Centers for Disease Control and Prevention recommend that HIV-1-infected mothers not breastfeed their infants to avoid risking postnatal transmission of HIV-1 infection.
Lamivudine
3TC is excreted into human milk. Samples of breast milk obtained from 20 mothers receiving 3TC monotherapy, 300 mg twice daily (2 times the dose in CIMDUO), had measurable concentrations of 3TC. There is no information on the effects of 3TC on the breastfed infant, or the effects of 3TC on milk production.
Tenofovir Disoproxil Fumarate
Samples of breast milk obtained from five HIV-1-infected mothers in the first postpartum week show that tenofovir is excreted in human milk at low levels. The impact of this exposure in breastfed infants is unknown and the effects of TDF on milk production is unknown.
Because of the potential for 1) HIV transmission (in HIV-negative infants); 2) developing viral resistance (in HIV-positive infants); and 3) adverse reactions in a breastfed infant similar to those seen in adults, instruct mothers not to breastfeed if they are receiving CIMDUO.
8.4 Pediatric Use
The safety and effectiveness of CIMDUO as a fixed-dose tablet in pediatric patients infected with HIV-1 and weighing at least 35 kg have been established based on clinical studies using the individual components (lamivudine and tenofovir disoproxil fumarate).
8.5 Geriatric Use
Clinical studies of CIMDUO did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. In general, caution should be exercised in the administration of CIMDUO in elderly patients reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
8.6 Renal Impairment
CIMDUO is not recommended for patients with impaired renal function (i.e., creatinine clearance less than 50 mL/min) or patients with end-stage renal disease (ESRD) requiring hemodialysis because it is a fixed-dose combination formulation that cannot be adjusted [see Dosage and Administration (2.3)].
10 OVERDOSAGE
If overdose occurs the patient must be monitored for evidence of toxicity, and standard supportive treatment applied as necessary.
Lamivudine: There is no known specific treatment for overdose with 3TC. If overdose occurs, the patient should be monitored and standard supportive treatment applied as required because a negligible amount of 3TC was removed via (4-hour) hemodialysis, continuous ambulatory peritoneal dialysis, and automated peritoneal dialysis, it is not known if continuous hemodialysis would provide clinical benefit in a 3TC overdose event.
Tenofovir Disoproxil Fumarate: Limited clinical experience at doses higher than the therapeutic dose of TDF 300 mg is available.
Tenofovir is efficiently removed by hemodialysis with an extraction coefficient of approximately 54%. Following a single 300-mg dose of tenofovir disoproxil fumarate, a 4-hour hemodialysis session removed approximately 10% of the administered tenofovir dose.
11 DESCRIPTION
CIMDUO tablets contain lamivudine (also known as 3TC), a synthetic nucleoside analogue with activity against HIV-1 and tenofovir disoproxil fumarate or tenofovir DF, a fumaric acid salt of bis-isopropoxycarbonyloxymethyl ester prodrug of tenofovir. In vivo tenofovir DF is converted to tenofovir, an acyclic nucleoside phosphonate (nucleotide) analog of adenosine 5’-monophosphate. Tenofovir exhibits activity against HIV-1 reverse transcriptase.
The chemical name of lamivudine is (-)-1-[2R,5S)-2-Hydroxymethyl)-1,3-oxathiolan-5-yl]cytosine. Lamivudine is the (-)enantiomer of a dideoxy analogue of cytidine. Lamivudine has also been referred to as (-)2′,3′-dideoxy, 3′-thiacytidine. It has a molecular formula of C8H11N3O3S and a molecular weight of 229.26 g per mol. It has the following structural formula:
Lamivudine is a white to off-white solid with a solubility of approximately 70 mg per mL in water at 20°C.
The chemical name of tenofovir DF is 9-[(R)-2-[[Bis[[(isopropoxycarbonyl)oxy]methoxy]phosphinyl]methoxy]propyl]adenine fumarate (1:1). It has a molecular formula of C19H30N5O10P•C4H4O4 and a molecular weight of 635.51. It has the following structural formula:
Tenofovir DF is a white to off-white powder with a solubility of 13.4 mg/mL in distilled water at 25°C. It has an octanol/phosphate buffer (pH 6.5) partition coefficient (log p) of 1.25 at 25°C.
CIMDUO tablets are for oral administration. Each film-coated tablet contains 300 mg of lamivudine and 300 mg of tenofovir disoproxil fumarate, which is equivalent to 245 mg of tenofovir disoproxil, and the following inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate and microcrystalline cellulose. The tablet coating contains polyethylene glycol, titanium dioxide, polyvinyl alcohol and talc.
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
CIMDUO is a fixed-dose combination of antiviral drugs 3TC and TDF with antiviral activity against HIV-1 [see Microbiology (12.4)].
12.3 Pharmacokinetics
Lamivudine
After oral administration of 2 mg/kg of 3TC twice a day to 9 adults with HIV-1, the peak serum 3TC concentration (Cmax) was 1.5 ± 0.5 mcg/mL (mean ± SD). The area under the plasma concentration versus time curve (AUC) and Cmax increased in proportion to oral dose over the range from 0.25 to 10 mg/kg and absolute bioavailability in 12 adult patients was 86% ± 16% (mean ± SD) for the 150-mg tablet and 87% ± 13% for the oral solution. Binding of 3TC to human plasma proteins is low (< 36%). Within 12 hours after a single oral dose of 3TC in 6 HIV-1-infected adults, 5.2% ± 1.4% (mean ± SD) of the dose was excreted as the trans-sulfoxide metabolite in the urine. The majority of 3TC is eliminated unchanged in urine by active organic cationic secretion and the observed mean elimination half-life (t1/2) ranged from 5 to 7 hours in most single-dose studies with serum sampling for 24 hours after dosing.
Tenofovir Disoproxil Fumarate
Following oral administration of a single 300-mg dose of TDF to HIV-1-infected subjects in the fasted state, maximum serum concentrations (Cmax) were achieved in 1.0 ± 0.4 hrs (mean ± SD) and Cmax and AUC values were 296 ± 90 ng/mL and 2287 ± 685 ng•hr/mL, respectively. The oral bioavailability of tenofovir from TDF in fasted subjects is approximately 25%. Less than 0.7% of tenofovir binds to human plasma proteins in vitro and the binding is independent of concentration over the range of 0.01 to 25 mcg/mL. Approximately 70 to 80% of the intravenous dose of tenofovir is recovered as unchanged drug in the urine. Tenofovir is eliminated by a combination of glomerular filtration and active tubular secretion with a renal clearance in adults with normal renal function of 243 ± 33 mL/min (mean ± SD). Following a single oral dose, the terminal elimination half-life of tenofovir is approximately 17 hours.
Special Populations
Race
Gender
There are no significant or clinically relevant gender differences in the pharmacokinetics of lamivudine and tenofovir.
Geriatric Patients
The pharmacokinetics of lamivudine and tenofovir have not been studied in patients over 65 years of age.
Patients with Renal Impairment
[See Use in Specific Populations (8.6).]
Lamivudine
The pharmacokinetics of lamivudine are altered in subjects with renal impairment (Table 3).
|
Parameter |
Creatinine Clearance Criterion (Number of Subjects) |
||
|
> 60 mL/min (n = 6) |
10-30 mL/min (n = 4) |
< 10 mL/min (n = 6) |
|
|
Creatinine clearance (mL/min) |
111 ± 14 |
28 ± 8 |
6 ± 2 |
|
Cmax (mcg/mL) |
2.6 ± 0.5 |
3.6 ± 0.8 |
5.8 ± 1.2 |
|
AUC∞ (mcg•h/mL) |
11.0 ± 1.7 |
48.0 ± 19 |
157 ± 74 |
|
Cl/F (mL/min) |
464 ± 76 |
114 ± 34 |
36 ± 11 |
Tenofovir Disoproxil Fumarate
The pharmacokinetics of tenofovir are altered in subjects with renal impairment [see Warnings and Precautions (5.3)]. In subjects with creatinine clearance below 50 mL/min or with end‑stage renal disease (ESRD) requiring dialysis, Cmax, and AUC0‑∞ of tenofovir were increased.
|
Baseline Creatinine Clearance (mL/min) |
> 80 (N = 3) |
50-80 (N = 10) |
30-49 (N = 8) |
12-29 (N = 11) |
|
Cmax (µg/mL) |
0.34 ± 0.03 |
0.33 ± 0.06 |
0.37 ± 0.16 |
0.60 ± 0.19 |
|
AUC0-∞ (µg•hr/mL) |
2.18 ± 0.26 |
3.06 ± 0.93 |
6.01 ± 2.50 |
15.98 ± 7.22 |
|
CL/F (mL/min) |
1043.7 ± 115.4 |
807.7 ± 279.2 |
444.4 ± 209.8 |
177.0 ± 97.1 |
|
CLrenal (mL/min) |
243.5 ± 33.3 |
168.6 ± 27.5 |
100.6 ± 27.5 |
43.0 ± 31.2 |
Patients with Hepatic Impairment:
Lamivudine
The pharmacokinetics of lamivudine were not altered by diminishing hepatic function. Safety and efficacy of lamivudine have not been established in the presence of decompensated liver disease.
Tenofovir Disoproxil Fumarate
The pharmacokinetics of tenofovir following a 300 mg single dose of TDF have been studied in non-HIV-infected subjects with moderate to severe (Child-Pugh B to C) hepatic impairment. There were no substantial alterations in tenofovir pharmacokinetics in subjects with hepatic impairment compared with unimpaired subjects.
Lamivudine
Effect of 3TC on the Pharmacokinetics of Other Agents
Based on in vitro study results, 3TC at therapeutic drug exposures is not expected to affect the pharmacokinetics of drugs that are substrates of the following transporters: organic anion transporter polypeptide 1B1/3 (OATP1B1/3), breast cancer resistance protein (BCRP), P-glycoprotein (P-gp), multidrug and toxin extrusion protein 1 (MATE1), MATE2-K, organic cation transporter 1 (OCT1), OCT2, or OCT3.
Effect of Other Agents on the Pharmacokinetics of 3TC
3TC is a substrate of MATE1, MATE2-K, and OCT2 in vitro. Trimethoprim (an inhibitor of these drug transporters) has been shown to increase 3TC plasma concentrations. This interaction is not considered clinically significant as no dose adjustment of 3TC is needed.
3TC is a substrate of P-gp and BCRP; however, considering its absolute bioavailability (87%), it is unlikely that these transporters play a significant role in the absorption of 3TC. Therefore, coadministration of drugs that are inhibitors of these efflux transporters is unlikely to affect the disposition and elimination of 3TC.
Interferon Alfa
There was no significant pharmacokinetic interaction between 3TC and interferon alfa in a trial of 19 healthy male subjects [see Warnings and Precautions (5.4)].
Ribavirin
In vitro data indicate ribavirin reduces phosphorylation of 3TC, stavudine, and zidovudine. However, no pharmacokinetic (e.g., plasma concentrations or intracellular triphosphorylated active metabolite concentrations) or pharmacodynamic (e.g., loss of HIV-1/HCV virologic suppression) interaction was observed when ribavirin and 3TC (n = 18), stavudine (n = 10), or zidovudine (n = 6) were coadministered as part of a multi-drug regimen to HIV-1/HCV co-infected subjects [see Warnings and Precautions (5.4)].
Sorbitol (Excipient)
3TC and sorbitol solutions were coadministered to 16 healthy adult subjects in an open-label, randomized sequence, 4-period, crossover trial. Each subject received a single 300-mg dose of 3TC oral solution alone or coadministered with a single dose of 3.2 grams, 10.2 grams, or 13.4 grams of sorbitol in solution. Coadministration of 3TC with sorbitol resulted in dose-dependent decreases of 20%, 39%, and 44% in the AUC(0-24), 14%, 32%, and 36% in the AUC(∞), and 28%, 52%, and 55% in the Cmax of lamivudine.
Trimethoprim/Sulfamethoxazole
3TC and TMP/SMX were coadministered to 14 HIV-1-positive subjects in a single-center, open-label, randomized, crossover trial. Each subject received treatment with a single 300-mg dose of 3TC and TMP 160 mg/SMX 800 mg once a day for 5 days with concomitant administration of 3TC 300 mg with the fifth dose in a crossover design. Coadministration of TMP/SMX with 3TC resulted in an increase of 43% ± 23% (mean ± SD) in 3TC AUC∞, a decrease of 29% ± 13% in 3TC oral clearance, and a decrease of 30% ± 36% in 3TC renal clearance. The pharmacokinetic properties of TMP and SMX were not altered by coadministration with 3TC. There is no information regarding the effect on 3TC pharmacokinetics of higher doses of TMP/SMX such as those used in treating PCP.
Tenofovir Disoproxil Fumarate
At concentrations substantially higher (~300-fold) than those observed in vivo, tenofovir did not inhibit in vitro CYP3A4, CYP2D6, CYP2C9, or CYP2E1. However, a small (6%) but statistically significant reduction in metabolism of CYP1A substrate was observed. Based on the results of in vitro experiments and the known elimination pathway of tenofovir, the potential for CYP mediated interactions involving TDF with other medicinal products is low.
TDF has been evaluated in healthy volunteers in combination with other antiretroviral and potential concomitant drugs. Tables 5 and 6 summarize pharmacokinetic effects of coadministered drug on tenofovir pharmacokinetics and effects of TDF on the pharmacokinetics of coadministered drug. Coadministration of TDF with didanosine results in changes in the pharmacokinetics of didanosine that may be of clinical significance. Concomitant dosing of TDF with didanosine significantly increases the Cmax and AUC of didanosine. When didanosine 250 mg enteric-coated capsules were administered with TDF, systemic exposures of didanosine were similar to those seen with the 400 mg enteric-coated capsules alone under fasted conditions (Table 5). The mechanism of this interaction is unknown.
No clinically significant drug interactions have been observed between TDF and efavirenz, methadone, nelfinavir, oral contraceptives, ribavirin, or sofosbuvir.
|
||||
|
Coadministered Drug |
Dose of Coadministered Drug (mg) |
% Change of Tenofovir Pharmacokinetic Parameters† (90% CI) |
||
|
Cmax |
AUC |
Cmin |
||
|
Atazanavir‡ |
400 once daily × 14 days |
↑ 14 (↑ 8 to ↑ 20) |
↑ 24 (↑ 21 to ↑ 28) |
↑ 22 (↑ 15 to ↑ 30) |
|
Atazanavir/ Ritonavir§ |
300/100 once daily |
↑ 34 (↑ 20 to ↑ 51) |
↑ 37 (↑ 30 to ↑ 45) |
↑ 29 (↑ 21 to ↑ 36) |
|
Darunavir/ Ritonavir§ |
300/100 twice daily |
↑ 24 (↑ 8 to ↑ 42) |
↑ 22 (↑ 10 to ↑ 35) |
↑ 37 (↑ 19 to ↑ 57) |
|
Indinavir |
800 three times daily × 7 days |
↑ 14 (↓ 3 to ↑ 33) |
↔ |
↔ |
|
Ledipasvir/ |
90/400 once daily × 10 days |
↑ 47 (↑ 37 to ↑ 58) |
↑ 35 (↑ 29 to ↑ 42) |
↑ 47 (↑ 38 to ↑ 57) |
|
Ledipasvir/ |
↑ 64 (↑ 54 to ↑ 74) |
↑ 50 (↑ 42 to ↑ 59) |
↑ 59 (↑ 49 to ↑ 70) |
|
|
Ledipasvir/ Sofosbuvirß |
90/400 once daily × 14 days |
↑ 79 (↑ 56 to ↑ 104) |
↑ 98 (↑ 77 to ↑ 123) |
↑ 163 (↑ 132 to ↑ 197) |
|
Ledipasvir/ Sofosbuvirà |
90/400 once daily × 10 days |
↑ 32 (↑ 25 to ↑ 39) |
↑ 40 (↑ 31 to ↑ 50) |
↑ 91 (↑ 74 to ↑ 110) |
|
Ledipasvir/ Sofosbuvirè |
90/400 once daily × 10 days |
↑ 61 (↑ 51 to ↑ 72) |
↑ 65 (↑ 59 to ↑ 71) |
↑ 115 (↑ 105 to ↑ 126) |
|
Lopinavir/ Ritonavir |
400/100 twice daily × 14 days |
↔ |
↑ 32 (↑ 25 to ↑ 38) |
↑ 51 (↑ 37 to ↑ 66) |
|
Saquinavir/ Ritonavir |
1000/100 twice daily × 14 days |
↔ |
↔ |
↑ 23 (↑ 16 to ↑ 30) |
|
Sofosbuvirð |
400 single dose |
↑ 25 ↑ 8 to ↑ 45) |
↔ |
↔ |
|
Sofosbuvir/ Velpatasvirø |
400/100 once daily |
↑ 55 (↑ 43 to ↑ 68) |
↑ 30 (↑ 24 to ↑ 36) |
↑ 39 (↑ 31 to ↑ 48) |
|
Sofosbuvir/ Velpatasvirý |
400/100 once daily |
↑ 55 (↑ 45 to ↑ 66) |
↑ 39 (↑ 33 to ↑ 44) |
↑ 52 (↑ 45 to ↑ 59) |
|
Sofosbuvir/ Velpatasvir£ |
400/100 once daily |
↑ 77 (↑ 53 to ↑ 104) |
↑ 81 (↑ 68 to ↑ 94) |
↑ 121 (↑ 100 to ↑ 143) |
|
Sofosbuvir/ Velpatasvir¥ |
400/100 once daily |
↑ 36 (↑ 25 to ↑ 47) |
↑ 35 (↑ 29 to ↑ 42) |
↑ 45 (↑ 39 to ↑ 51) |
|
Sofosbuvir/ VelpatasvirΠ|
400/100 once daily |
↑ 44 (↑ 33 to ↑ 55) |
↑ 40 (↑ 34 to ↑ 46) |
↑ 84 (↑ 76 to ↑ 92) |
|
Sofosbuvir/ Velpatasvirœ |
400/100 once daily |
↑ 46 (↑ 39 to ↑ 54) |
↑ 40 (↑ 34 to ↑ 45) |
↑ 70 (↑ 61 to ↑ 79) |
|
Tacrolimus |
0.05 mg/kg twice daily × 7 days |
↑ 13 (↑ 1 to ↑ 27) |
↔ |
↔ |
|
Tipranavir/ RitonavirƉ |
500/100 twice daily |
↓ 23 (↓ 32 to ↓ 13) |
↓ 2 (↓ 9 to ↑ 5) |
↑ 7 (↓ 2 to ↑ 17) |
|
750/200 twice daily (23 doses) |
↓ 38 (↓ 46 to ↓ 29) |
↑ 2 (↓ 6 to ↑ 10) |
↑ 14 (↑ 1 to ↑ 27) |
|
No effect on the pharmacokinetic parameters of the following coadministered drugs was observed with TDF: abacavir, didanosine (buffered tablets), emtricitabine, entecavir, and lamivudine.
|
|||||
|
Coadministered Drug |
Dose of Coadministered Drug (mg) |
% Change of Coadministered Drug Pharmacokinetic Parameters* (90% CI) |
|||
|
Cmax |
AUC |
Cmin |
|||
|
Abacavir |
300 once |
↑ 12 (↓ 1 to ↑ 26) |
↔ |
NA |
|
|
Atazanavir† |
400 once daily × 14 days |
↓ 21 (↓ 27 to ↓ 14) |
↓ 25 (↓ 30 to ↓ 19) |
↓ 40 (↓ 48 to ↓ 32) |
|
|
Atazanavir† |
Atazanavir/ Ritonavir 300/100 once daily × 42 days |
↓ 28 (↓ 50 to ↑ 5) |
↓ 25‡ (↓ 42 to ↓ 3) |
↓ 23‡ (↓ 46 to ↑ 10) |
|
|
Darunavir§ |
Darunavir/Ritonavir 300/100 once daily |
↑ 16 (↓ 6 to ↑ 42) |
↑ 21 (↓ 5 to ↑ 54) |
↑ 24 (↓ 10 to ↑ 69) |
|
|
Didanosine¶ |
250 once, simultaneously with VIREAD® and a light meal# |
↓ 20Þ (↓ 32 to ↓ 7) |
↔Þ |
NA |
|
|
Emtricitabine |
200 once daily × 7 days |
↔ |
↔ |
↑ 20 (↑ 12 to ↑ 29) |
|
|
Entecavir |
1 mg once daily × 10 days |
↔ |
↑ 13 (↑ 11 to ↑ 15) |
↔ |
|
|
Indinavir |
800 three times daily × 7 days |
↓ 11 (↓ 30 to ↑ 12) |
↔ |
↔ |
|
|
Lamivudine |
150 twice daily × 7 days |
↓ 24 (↓ 34 to ↓ 12) |
↔ |
↔ |
|
|
Lopinavir Ritonavir |
Lopinavir/Ritonavir 400/100 twice daily × 14 days |
↔ |
↔ ↔ |
↔ ↔ |
|
|
Saquinavir |
Saquinavir/Ritonavir 1000/100 twice daily × 14 days |
↑ 22 (↑ 6 to ↑ 41) |
↑ 29ß (↑ 12 to ↑ 48) |
↑ 47ß (↑ 23 to ↑ 76) |
|
|
Ritonavir |
↔ |
↔ |
↑ 23 (↑ 3 to ↑ 46) |
||
|
Tacrolimus |
0.05 mg/kg twice daily × 7 days |
↔ |
↔ |
↔ |
|
|
Tipranavirà |
Tipranavir/Ritonavir 500/100 twice daily |
↓ 17 (↓ 26 to ↓ 6) |
↓ 18 (↓ 25 to ↓ 9) |
↓ 21 (↓ 30 to ↓ 10) |
|
|
Tipranavir/Ritonavir 750/200 twice daily (23 doses) |
↓ 11 (↓ 16 to ↓ 4) |
↓ 9 (↓ 15 to ↓ 3) |
↓ 12 (↓ 22 to 0) |
||
12.4 Microbiology
Mechanism of Action
Lamivudine
3TC is a synthetic nucleoside analogue with activity against HIV-1 and HBV. Intracellularly, 3TC is phosphorylated to its active 5’‑triphosphate metabolite, lamivudine triphosphate (3TC-TP). The principal mode of action of 3TC‑TP is inhibition of HIV-1 reverse transcriptase (RT) via DNA chain termination after incorporation of the nucleotide analogue.
Tenofovir Disoproxil Fumarate
TDF is an acyclic nucleoside phosphonate diester analog of adenosine monophosphate. TDF requires initial diester hydrolysis for conversion to tenofovir and subsequent phosphorylations by cellular enzymes to form tenofovir diphosphate. Tenofovir diphosphate inhibits the activity of HIV-1 reverse transcriptase and HBV reverse transcriptase by competing with the natural substrate deoxyadenosine 5’-triphosphate and, after incorporation into DNA, by DNA chain termination. Tenofovir diphosphate is a weak inhibitor of mammalian DNA polymerases α, β, and mitochondrial DNA polymerase γ.
Antiviral Activity
Lamivudine
The antiviral activity of 3TC against HIV-1 was assessed in a number of cell lines (including monocytes and fresh human peripheral blood lymphocytes (PBMCs) using standard susceptibility assays. EC50 values were in the range of 3 to 15,000 nM. (1 μM = 0.23 mcg/mL). The median EC50 values of 3TC were 60 nM (range: 20 to 70 nM), 35 nM (range: 30 to 40 nM), 30 nM (range: 20 to 90 nM), 20 nM (range: 3 to 40 nM), 30 nM (range: 1 to 60 nM), 30 nM (range: 20 to 70 nM), 30 nM (range: 3 to 70 nM), and 30 nM (range: 20 to 90 nM) against HIV-1 clades A-G and group O viruses (n = 3 except n = 2 for clade B), respectively. The EC50 values against HIV-2 isolates (n = 4) ranged from 3 to 120 nM in PBMCs. 3TC was not antagonistic to all tested anti-HIV agents. Ribavirin (50 μM) used in the treatment of chronic HCV infection decreased the anti-HIV-1 activity of 3TC by 3.5-fold in MT-4 cells.
Tenofovir Disoproxil Fumarate
The antiviral activity of tenofovir against laboratory and clinical isolates of HIV-1 was assessed in lymphoblastoid cell lines, primary monocyte/macrophage cells and peripheral blood lymphocytes. The EC50 (50% effective concentration) values for tenofovir were in the range of 0.04 μM to 8.5 μM. Tenofovir displayed antiviral activity in cell culture against HIV-1 clades A, B, C, D, E, F, G, and O (EC50 values ranged from 0.5 μM to 2.2 μM) and strain-specific activity against HIV-2 (EC50 values ranged from 1.6 μM to 5.5 μM). Please see the full prescribing information for VIREAD for information regarding the inhibitory activity of TDF against HBV.
Resistance
Lamivudine
3TC-resistant variants of HIV‑1 have been selected in cell culture. Genotypic analysis showed that resistance was predominantly due to a methionine to valine or isoleucine (M184V/I) substitution in reverse transcriptase.
Tenofovir Disoproxil Fumarate
HIV-1 isolates with reduced susceptibility to tenofovir have been selected in cell culture. These viruses expressed a K65R substitution in reverse transcriptase and showed a 2- to 4-fold reduction in susceptibility to tenofovir. In addition, a K70E substitution in HIV-1 reverse transcriptase has been selected by tenofovir and results in low-level reduced susceptibility to tenofovir. K65R substitutions developed in some subjects failing a tenofovir disoproxil fumarate regimen.
Cross-Resistance
Lamivudine
Cross-resistance among NRTIs has been observed. 3TC-resistant HIV-1 isolates were cross-resistant in cell culture to didanosine (ddI). Cross-resistance is also expected with abacavir and emtricitabine as these select M184V substitutions.
Tenofovir Disoproxil Fumarate
Cross-resistance among NRTIs has been observed. The K65R and K70E substitutions selected by tenofovir are also selected in some HIV-1-infected subjects treated with abacavir or didanosine. HIV-1 isolates with the K65R substitution also showed reduced susceptibility to FTC and 3TC. HIV-1 isolates from subjects (N = 20) whose HIV-1 expressed a mean of 3 zidovudine-associated RT amino acid substitutions (M41L, D67N, K70R, L210W, T215Y/F, or K219Q/E/N) showed a 3.1-fold decrease in the susceptibility to tenofovir. Subjects whose virus expressed an L74V substitution without zidovudine resistance-associated substitutions (N = 8) had reduced response to VIREAD. Limited data are available for patients whose virus expressed a Y115F substitution (N = 3), Q151M substitution (N = 2), or T69 insertion (N = 4), all of whom had a reduced response.
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
Lamivudine
Long-term carcinogenicity studies with 3TC in mice and rats showed no evidence of carcinogenic potential at exposures up to 10 times (mice) and 58 times (rats) the human exposures at the recommended dose of 300 mg. 3TC was not mutagenic in a microbial mutagenicity assay, in an in vitro cell transformation assay, in a rat micronucleus test, in a rat bone marrow cytogenetic assay, and in assay for unscheduled DNA synthesis in rat liver. 3TC showed no evidence of in vivo genotoxic activity in the rat at oral doses of up to 2000 mg per kg, producing plasma levels of 35 to 45 times those in humans at the recommended dose for HIV‑1 infection. In a study of reproductive performance, 3TC administered to rats at doses up to 4,000 mg per kg per day, producing plasma levels 47 to 70 times those in humans, revealed no evidence of impaired fertility and no effect on the survival, growth, and development to weaning of the offspring.
Tenofovir Disoproxil Fumarate
Long-term oral carcinogenicity studies of TDF in mice and rats were carried out at exposures up to approximately 16 times (mice) and 5 times (rats) those observed in humans at the therapeutic dose for HIV-1 infection. At the high dose in female mice, liver adenomas were increased at exposures 16 times that in humans. In rats, the study was negative for carcinogenic findings at exposures up to 5 times that observed in humans at the therapeutic dose.
TDF was mutagenic in the in vitro mouse lymphoma assay and negative in an in vitro bacterial mutagenicity test (Ames test). In an in vivo mouse micronucleus assay, TDF was negative when administered to male mice.
There were no effects on fertility, mating performance or early embryonic development when TDF was administered to male rats at a dose equivalent to 10 times the human dose based on body surface area comparisons for 28 days prior to mating and to female rats for 15 days prior to mating through day seven of gestation. There was, however, an alteration of the estrous cycle in female rats.
13.2 Animal Toxicology and/or Pharmacology
Tenofovir Disoproxil Fumarate
Tenofovir and TDF administered in toxicology studies to rats, dogs, and monkeys at exposures (based on AUCs) greater than or equal to 6-fold those observed in humans caused bone toxicity. In monkeys the bone toxicity was diagnosed as osteomalacia. Osteomalacia observed in monkeys appeared to be reversible upon dose reduction or discontinuation of tenofovir. In rats and dogs, the bone toxicity manifested as reduced bone mineral density. The mechanism(s) underlying bone toxicity is unknown.
Evidence of renal toxicity was noted in 4 animal species. Increases in serum creatinine, BUN, glycosuria, proteinuria, phosphaturia, and/or calciuria and decreases in serum phosphate were observed to varying degrees in these animals. These toxicities were noted at exposures (based on AUCs) 2 to 20 times higher than those observed in humans. The relationship of the renal abnormalities, particularly the phosphaturia, to the bone toxicity is not known.
14 CLINICAL STUDIES
14.1 Clinical Efficacy in Patients with HIV-1 Infection
Treatment-Naïve Adult Patients
Trial 903
Data through 144 weeks are reported for Trial 903, a double-blind, active-controlled multicenter trial comparing EFV 600 mg + 3TC 300 mg + TDF 300 mg vs. EFV 600 mg + 3TC 300 mg + stavudine (d4T) 40 mg in 600 antiretroviral-naïve subjects. Subjects had a mean age of 36 years (range 18-64); 74% were male, 64% were Caucasian, and 20% were Black. The mean baseline CD4+ cell count was 279 cells/mm3 (range 3-956) and median baseline plasma HIV-1 RNA was 77,600 copies/mL (range 417-5,130,000). Subjects were stratified by baseline HIV-1 RNA and CD4+ cell count. Forty-three percent of subjects had baseline viral loads > 100,000 copies/mL and 39% had CD4+ cell counts < 200 cells/mm3. Treatment outcomes through 48 and 144 weeks are presented in Table 7.
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Outcomes |
At Week 48 |
At Week 144 |
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EFV + 3TC + TDF (N = 299) |
EFV + 3TC + d4T (N = 301) |
EFV + 3TC + TDF (N = 299) |
EFV + 3TC + d4T (N = 301) |
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Responder* |
79% |
82% |
68% |
62% |
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Virologic failure† |
6% |
4% |
10% |
8% |
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Rebound |
5% |
3% |
8% |
7% |
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Never suppressed |
0% |
1% |
0% |
0% |
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Added an antiretroviral agent |
1% |
1% |
2% |
1% |
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Death |
< 1% |
1% |
< 1% |
2% |
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Discontinued due to adverse event |
6% |
6% |
8% |
13% |
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Discontinued for other reasons‡ |
8% |
7% |
14% |
15% |
Achievement of plasma HIV-1 RNA concentrations of less than 400 copies/mL at Week 144 was similar between the two treatment groups for the population stratified at baseline on the basis of HIV-1 RNA concentration (> or ≤ 100,000 copies/mL) and CD4+ cell count (< or ≥ 200 cells/mm3). Through 144 weeks of therapy, 62% and 58% of subjects in the TDF and stavudine arms, respectively, achieved and maintained confirmed HIV-1 RNA < 50 copies/mL. The mean increase from baseline in CD4+ cell count was 263 cells/mm3 for the TDF arm and 283 cells/mm3 for the stavudine arm.
Through 144 weeks, 11 subjects in the TDF group and 9 subjects in the stavudine group experienced a new CDC Class C event.
16 HOW SUPPLIED/STORAGE AND HANDLING
CIMDUO (lamivudine and tenofovir disoproxil fumarate) tablets 300 mg/300 mg are white to off-white, film-coated, oval tablets debossed with “M112” on one side and plain on the other side.
They are supplied as follows:
NDC 49502-450-93
cartons containing bottles of 30 tablets with desiccant, induction seal and child-resistant cap
NDC 49502-450-77
cartons containing bottles of 90 tablets with desiccant, induction seal and child-resistant cap
Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F). [See USP Controlled Room Temperature.]
Dispense in original container.
17 PATIENT COUNSELING INFORMATION
Advise the patient to read the FDA-approved patient labeling (Patient Information).
Lactic Acidosis and Severe Hepatomegaly: Inform patients that lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported. Treatment with CIMDUO should be suspended in any patient who develops clinical symptoms suggestive of lactic acidosis or pronounced hepatotoxicity (including nausea, vomiting, unusual or unexpected stomach discomfort, and weakness) [see Warnings and Precautions (5.1)].
Post Treatment Acute Exacerbation of Hepatitis B in Patients with HBV Co-Infection: Severe acute exacerbations of hepatitis have been reported in patients who are infected with HBV or coinfected with HBV and HIV-1 and have discontinued 3TC and TDF, components of CIMDUO. Test patients with HIV-1 for hepatitis B virus (HBV) before initiating antiretroviral therapy. In patients with chronic hepatitis B, it is important to obtain HIV antibody testing prior to initiating 3TC and TDF, components of CIMDUO [see Warnings and Precautions (5.2)].
New Onset or Worsening Renal Impairment: Inform patients that renal impairment, including cases of acute renal failure and Fanconi syndrome, has been reported. Advise patients with impaired renal function (i.e., creatinine clearance less than 50 mL/min) or patients with end-stage renal disease (ESRD) requiring hemodialysis to avoid CIMDUO with concurrent or recent use of a nephrotoxic agent (e.g., high-dose or multiple NSAIDs) for patients [see Dosage and Administration (2.3), Warnings and Precautions (5.3)].
Risk of Hepatic Decompensation in Patients with HIV-1/HCV Co-Infection: Inform patients with HIV-1/HCV co-infection that hepatic decompensation (some fatal) has occurred in HIV-1/HCV co-infected patients receiving combination antiretroviral therapy for HIV-1 and interferon alfa with or without ribavirin [see Warnings and Precautions (5.4)].
Pancreatitis: Advise patients or guardians to monitor pediatric patients for signs and symptoms of pancreatitis [see Warnings and Precautions (5.5)].
Decreases in Bone Mineral Density: Advise patients that decreases in bone mineral density have been observed with the use of 3TC and TDF, components of CIMDUO, in patients with HIV [see Warnings and Precautions (5.6)].
Immune Reconstitution Syndrome: Advise patients to inform their healthcare provider immediately of any symptoms of infection, as in some patients with advanced HIV infection, signs and symptoms of inflammation from previous infections may occur soon after anti-HIV treatment is started [see Warnings and Precautions (5.7)].
Fat Redistribution: Inform patients that redistribution or accumulation of body fat may occur in patients receiving antiretroviral therapy, including CIMDUO, and that the cause and long‑term health effects of these conditions are not known at this time [see Warnings and Precautions (5.8)].
Administration Instructions: Inform patients that it is important to take CIMDUO once daily on a regular dosing schedule and to avoid missing doses as it can result in development of resistance. Advise patients if a dose is missed, take it as soon as possible unless it is almost time for the next dose [see Dosage and Administration (2.2)].
Pregnancy Registry: Advise patients that there is an antiretroviral pregnancy registry to monitor fetal outcomes in women exposed to CIMDUO [see Use in Specific Populations (8.1)].
Lactation: Instruct women with HIV-1 infection not to breastfeed because HIV-1 can be passed to the baby in breast milk [see Use in Specific Populations (8.2)].
Rx only
Manufactured for:
Mylan Specialty L.P.
Morgantown, WV 26505 U.S.A.
Manufactured by:
Mylan Laboratories Limited
Hyderabad — 500 096, India
© 2021 Viatris Inc.
CIMDUO is a registered trademark of Mylan Pharmaceuticals Inc., a Viatris Company.
Other brands listed are the registered trademarks of their respective owners and are not trademarks of Mylan Laboratories Limited or Mylan Pharmaceuticals Inc.
Patient Information
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CIMDUO® (sim-DEW-oh) |
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What is the most important information I should know about CIMDUO? CIMDUO can cause serious side effects, including:
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For more information about side effects, see “What are the possible side effects of CIMDUO?” |
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What is CIMDUO? CIMDUO is a prescription medicine that is used with other antiretroviral medicines to treat Human Immunodeficiency Virus-1 (HIV-1) in adults and children weighing at least 35 kg. HIV-1 is the virus that causes AIDS (Acquired Immune Deficiency Syndrome). CIMDUO contains the prescription medicines lamivudine and tenofovir disoproxil fumarate. |
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Do not take CIMDUO if you:
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Before you take CIMDUO, tell your healthcare provider about all of your medical conditions, including if you:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal supplements. Some medicines interact with CIMDUO. CIMDUO may affect the way other medicines work, and other medicines may affect how CIMDUO works. Keep a list of your medicines and show it to your healthcare provider and pharmacist when you get a new medicine.
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How should I take CIMDUO?
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What should I avoid while taking CIMDUO? You should avoid taking medicines that contain sorbitol during treatment with CIMDUO. |
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What are the possible side effects of CIMDUO? CIMDUO may cause serious side effects, including:
The most common side effects of CIMDUO include: |
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Tell your healthcare provider if you have any side effect that bothers you or that does not go away. These are not all the possible side effects of CIMDUO. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. |
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How should I store CIMDUO?
Keep CIMDUO and all medicines out of the reach of children. |
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General information about the safe and effective use of CIMDUO. Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use CIMDUO for a condition for which it was not prescribed. Do not give CIMDUO to other people, even if they have the same symptoms that you have. It may harm them. If you would like more information, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about CIMDUO that is written for health professionals. |
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What are the ingredients in CIMDUO? Active ingredient: lamivudine and tenofovir disoproxil fumarate Inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate and microcrystalline cellulose. The tablet coating contains polyethylene glycol, titanium dioxide, polyvinyl alcohol and talc.
Manufactured for: Manufactured by:
© 2021 Viatris Inc.
CIMDUO is a registered trademark of Mylan Pharmaceuticals Inc., a Viatris Company.
Other brands listed are the registered trademarks of their respective owners and are not trademarks of Mylan Laboratories Limited or Mylan Pharmaceuticals Inc.
75078442 MS:TLDT:R2 For more information, call Mylan at 1-877-446-3679 (1-877-4-INFO-RX). |
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This Patient Information has been approved by the U.S. Food and Drug Administration. Revised: 2/2021
PRINCIPAL DISPLAY PANEL – 300 mg/300 mg
NDC 49502-450-93 Rx only
CIMDUO®
(lamivudine and
tenofovir disoproxil
fumarate) tablets
300 mg/300 mg
Each film-coated tablet contains:
Lamivudine, USP 300 mg
Tenofovir Disoproxil
Fumarate 300 mg
equivalent to 245 mg
of tenofovir disoproxil)
Usual Dosage: See accompanying
prescribing information.
Keep this and all medication
out of the reach of children.
Store at 20°C to 25°C (68°F to
77°F). [See USP Controlled Room
Temperature.]
Dispense only in original
container.
Keep container tightly
closed.
Manufactured for:
Mylan Specialty L.P.
Morgantown, WV 26505 U.S.A.
Made in India
Code No.: MH/DRUGS/AD/089
MS:MXA:45093:1C:R2
Mylan.com
© 2021 Viatris Inc.
CIMDUO is a registered
trademark of Mylan
Pharmaceuticals Inc.,
a Viatris Company.
INGREDIENTS AND APPEARANCE
| CIMDUO
lamivudine and tenofovir disoproxil fumarate tablet, film coated |
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| Labeler - Mylan Specialty L.P. (194775557) |