Sirolimus 1 mg/mL Solution
Other active recalls for Sirolimus (different manufacturers) — 1 · tap to view
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Kinase Inhibitor class.
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🏭 Manufacturer & labeler
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🩺 Clinical
Sirolimus is used in combination with other medications to prevent rejection of kidney transplants. It is also used to treat lymphangioleiomyomatosis (LAM; a rare lung condition). Sirolimus is in a class of medications called immunosuppressants. It works by suppressing the body's immune system.
Read the full MedlinePlus article ↗- Sirolimus comes in a few different forms, and each one has its own approved use. The oral tablets and liquid are mainly used to prevent kidney transplant rejection and to treat a r...
- What exactly is sirolimus being used for — I've seen it listed for so many different things?
- Yes, it matters — but not in the way you might think. You don't have to eat with it, but you do need to be consistent. Food, especially a high-fat meal, can increase how much sirol...
- Does it matter if I take my oral sirolimus with food or without?
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UNII 6OZP39ZG8H
Polysorbate 80 is a synthetic emulsifier derived from sorbitol and oleic acid. It helps mix oil and water-based ingredients together in medications and improves how the product disperses in the body.
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UNII 6DC9Q167V3
Propylene glycol is a clear liquid derived from petroleum or vegetable sources. It acts as a solvent, humectant, and preservative in medicines, helping dissolve active ingredients and maintain product stability.
2 inactive ingredients listed in the exact product block matched to this NDC.
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ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per mL | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $4.563 | $273.80 / 60 ml |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · Q2 2026 | $14.50 | $870.20 / 60 ml |
| Medicare Part B allowsASP · J7520 | $0.744 / J7520 unit | — |
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🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Sirolimus 1 mg/mLthis 16571-0806-06 | Rising | 1 kit | $4.563 | AA | Availability likely | — |
| Sirolimus 1 mg/mL 31722-0316-31 | Camber | 1 kit | $4.563 | AA | Availability likely | — |
| Sirolimus 1 mg/mL 59762-1205-06 | Mylan | 1 kit | $4.563 | AA | Availability likely | — |
| Sirolimus 1 mg/mL 60505-6197-02 | Apotex | 1 bottle | $4.563 | AA | Availability likely | — |
| Sirolimus 1 mg/mL 66689-0347-02 | VistaPharm, | 1 kit | $4.563 | AA | Availability likely | — |
| Sirolimus 1 mg/mL 69238-1594-03 | Amneal | 1 kit | $4.563 | AA | Availability likely | — |
| sirolimus 1 mg/mL 72205-0099-78 | Novadoz | 1 bottle | $4.563 | AA | Availability likely | — |
| sirolimus 1 mg/mL 72603-0409-01 | Northstar | 1 bottle | $4.563 | AA | Availability likely | — |
| sirolimus 1 mg/mL 72162-2641-06 | Bryant | 1 bottle | — | AA | FDA listed | — |
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⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
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📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
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📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 16571-0806-06 You're viewing this | 1 CARTON in 1 KIT (16571-806-06) / 1 BOTTLE, GLASS in 1 CARTON / 60 mL in 1 BOTTLE, GLASS | 2025-07-15 | Active |
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Kit / multi-component package
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| NDC identity (package / product / labeler codes) | ✓ Available |
| Labeler | ✓ Available |
| Product & package description | ✓ Available |
| Marketing category & status | ✓ Available |
| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | ✓ Available |
| Inactive ingredients (structured) | ✓ Available |
| NADAC pharmacy acquisition price (CMS) | ✓ Available |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | ✓ Available |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
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📄 Full prescribing information FDA SPL
🚨 Boxed Warning ▾
WARNING: IMMUNOSUPPRESSION, USE IS NOT RECOMMENDED IN LIVER OR LUNG TRANSPLANT PATIENTS Increased susceptibility to infection and the possible development of lymphoma and other malignancies may result from immunosuppression Increased susceptibility to infection and the possible development of lymphoma may result from immunosuppression. Only physicians experienced in immunosuppressive therapy and management of renal transplant patients should use sirolimus for prophylaxis of organ rejection in patients receiving renal transplants.
Patients receiving the drug should be managed in facilities equipped and staffed with adequate laboratory and supportive medical resources. The physician responsible for maintenance therapy should have complete information requisite for the follow-up of the patient [ see Warnings and Precautions (5.1) ] . The safety and efficacy of sirolimus as immunosuppressive therapy have not been established in liver or lung transplant patients, and therefore, such use is not recommended [ see Warnings and Precautions (5.2 , 5.3) ] .
Liver Transplantation – Excess Mortality, Graft Loss, and Hepatic Artery Thrombosis (HAT) The use of sirolimus in combination with tacrolimus was associated with excess mortality and graft loss in a study in de novo liver transplant patients. Many of these patients had evidence of infection at or near the time of death. In this and another study in de novo liver transplant patients, the use of sirolimus in combination with cyclosporine or tacrolimus was associated with an increase in HAT; most cases of HAT occurred within 30 days post-transplantation and most led to graft loss or death [ see Warnings and Precautions (5.2) ].
Lung Transplantation – Bronchial Anastomotic Dehiscence Cases of bronchial anastomotic dehiscence, most fatal, have been reported in de novo lung transplant patients when sirolimus has been used as part of an immunosuppressive regimen [ see Warnings and Precautions (5.3) ]. WARNING: IMMUNOSUPPRESSION, USE IS NOT RECOMMENDED IN LIVER OR LUNG TRANSPLANT PATIENTS See full prescribing information for complete boxed warning. • Increased susceptibility to infection and the possible development of lymphoma and other malignancies may result from immunosuppression ( 5.1 ).
Only physicians experienced in immunosuppressive therapy and management of renal transplant patients should use sirolimus for prophylaxis of organ rejection in patients receiving renal transplants. • The safety and efficacy of sirolimus as immunosuppressive therapy have not been established in liver or lung transplant patients, and therefore, such use is not recommended ( 5.2 , 5.3 ). – Liver Transplantation – Excess mortality, graft loss, and hepatic artery thrombosis ( 5.2 ). – Lung Transplantation – Bronchial anastomotic dehiscence ( 5.3 ).
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE Sirolimus is an mTOR inhibitor immunosuppressant indicated for the prophylaxis of organ rejection in patients aged ≥13 years receiving renal transplants: Patients at low- to moderate-immunologic risk: Use initially with cyclosporine (CsA) and corticosteroids. CsA withdrawal is recommended 2–4 months after transplantation ( 1.1 ). Patients at high-immunologic risk: Use in combination with CsA and corticosteroids for the first 12 months following transplantation ( 1.1 ).
Safety and efficacy of CsA withdrawal has not been established in high risk patients ( 1.1 , 1.2 , 14.3 ). Sirolimus is an mTOR inhibitor indicated for the treatment of patients with lymphangioleiomyomatosis ( 1.3 ).
1.1Prophylaxis of Organ Rejection in Renal Transplantation Sirolimus oral solution is indicated for the prophylaxis of organ rejection in patients aged 13 years or older receiving renal transplants. In patients at low-to moderate-immunologic risk , it is recommended that sirolimus oral solution be used initially in a regimen with cyclosporine and corticosteroids; cyclosporine should be withdrawn 2 to 4 months after transplantation [ see Dosage and Administration (2.2) ]. In patients at high-immunologic risk (defined as Black recipients and/or repeat renal transplant recipients who lost a previous allograft for immunologic reason and/or patients with high panel-reactive antibodies [PRA; peak PRA level > 80%]), it is recommended that sirolimus oral solution be used in combination with cyclosporine and corticosteroids for the first year following transplantation [ see Dosage and Administration (2.3) , Clinical Studies (14.3) ].
1.2Limitations of Use in Renal Transplantation Cyclosporine withdrawal has not been studied in patients with Banff Grade 3 acute rejection or vascular rejection prior to cyclosporine withdrawal, those who are dialysis-dependent, those with serum creatinine >4.5 mg/dL, Black patients, patients of multi-organ transplants, secondary transplants, or those with high levels of panel-reactive antibodies [ see Clinical Studies (14.2) ]. In patients at high-immunologic risk , the safety and efficacy of sirolimus oral solution used in combination with cyclosporine and corticosteroids has not been studied beyond one year; therefore after the first 12 months following transplantation, any adjustments to the immunosuppressive regimen should be considered on the basis of the clinical status of the patient [ see Clinical Studies (14.3) ].
In pediatric patients , the safety and efficacy of sirolimus oral solution have not been established in patients <13 years old, or in pediatric (<18 years) renal transplant patients considered at high-immunologic risk [ see Adverse Reactions (6.5) , Clinical Studies (14.6) ]. The safety and efficacy of de novo use of sirolimus oral solution without cyclosporine have not been established in renal transplant patients [ see Warnings and Precautions (5.12) ]. The safety and efficacy of conversion from calcineurin inhibitors to sirolimus oral solution in maintenance renal transplant patients have not been established [ see Clinical Studies (14.4) ].
1.3Treatment of Patients with Lymphangioleiomyomatosis Sirolimus oral solution is indicated for the treatment of patients with lymphangioleiomyomatosis (LAM).
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION Sirolimus oral solution is to be administered orally once daily, consistently with or without food [ see Dosage and Administration (2.5) , Clinical Pharmacology (12.3) ]. Renal Transplant Patients: Administer once daily by mouth, consistently with or without food ( 2 ). Administer the initial dose as soon as possible after transplantation and 4 hours after CsA ( 2.1 , 7.1 ).
Adjust the sirolimus oral solution maintenance dose to achieve sirolimus trough concentrations within the target-range ( 2.5 ). Hepatic impairment: Reduce maintenance dose in patients with hepatic impairment ( 2.7 , 8.6 , 12.3 ). In renal transplant patients at low-to moderate-immunologic risk : Sirolimus oral solution and CsA Combination Therapy: One loading dose of 6 mg on day 1, followed by daily maintenance doses of 2 mg ( 2.2 ).
Sirolimus oral solution Following CsA Withdrawal: 2 to 4 months post-transplantation, withdraw CsA over 4 to 8 weeks ( 2.2 ). In renal transplant patients at high-immunologic risk: Sirolimus oral solution and CsA Combination Therapy (for the first 12 months post-transplantation): One loading dose of up to 15 mg on day 1, followed by daily maintenance doses of 5 mg ( 2.3 ). Lymphangioleiomyomatosis Patients: Administer once daily by mouth, consistently with or without food ( 2 ).
Recommended initial sirolimus oral solution dose is 2 mg/day ( 2.4 ). Adjust the sirolimus oral solution dose to achieve sirolimus trough concentrations between 5–15 ng/mL ( 2.4 ). Hepatic impairment: Reduce maintenance dose in patients with hepatic impairment ( 2.7 , 8.6 , 12.3 ).
Therapeutic drug monitoring is recommended for all patients ( 2.5 , 5.17 ).
2.1General Dosing Guidance for Renal Transplant Patients The initial dose of sirolimus oral solution should be administered as soon as possible after transplantation. It is recommended that sirolimus oral solution be taken 4 hours after administration of cyclosporine oral solution (MODIFIED) and or/cyclosporine capsules (MODIFIED) [ see Drug Interactions (7.2) ]. Frequent sirolimus oral solution dose adjustments based on non-steady-state sirolimus concentrations can lead to overdosing or underdosing because sirolimus has a long half-life.
Once sirolimus oral solution maintenance dose is adjusted, patients should continue on the new maintenance dose for at least 7 to 14 days before further dosage adjustment with concentration monitoring. In most patients, dose adjustments can be based on simple proportion: new sirolimus oral solution dose = current dose × (target concentration/current concentration). A loading dose should be considered in addition to a new maintenance dose when it is necessary to increase sirolimus trough concentrations: sirolimus oral solution loading dose = 3 × (new maintenance dose - current maintenance dose).
The maximum sirolimus oral solution dose administered on any day should not exceed 40 mg. If an estimated daily dose exceeds 40 mg due to the addition of a loading dose, the loading dose should be administered over 2 days. Sirolimus trough concentrations should be monitored at least 3 to 4 days after a loading dose(s).
Two milligrams (2 mg) of sirolimus oral solution have been demonstrated to be clinically equivalent to 2 mg sirolimus Tablets; hence, at this dose these two formulations are interchangeable. However, it is not known if higher doses of sirolimus Oral Solution are clinically equivalent to higher doses of sirolimus Tablets on a mg-to-mg basis [ see Clinical Pharmacology (12.3) ].
2.2Renal Transplant Patients at Low- to Moderate-Immunologic Risk Sirolimus Oral Solution and Cyclosporine Combination Therapy For de novo renal transplant patients, it is recommended that sirolimus oral solution be used initially in a regimen with cyclosporine and corticosteroids. A loading dose of sirolimus oral solution equivalent to 3 times the maintenance dose should be given, i.e. a daily maintenance dose of 2 mg should be preceded with a loading dose o…
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS Oral Solution: 60 mg per 60 mL in amber glass bottle ( 3.1 ).
3.1Sirolimus Oral Solution 60 mg per 60 mL in amber glass bottle.
⛔ Contraindications ▾
4 CONTRAINDICATIONS Sirolimus oral solution is contraindicated in patients with a hypersensitivity to sirolimus [ see Warnings and Precautions (5.4) ]. Hypersensitivity to sirolimus ( 4 ).
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS Hypersensitivity Reactions ( 5.4 ) Angioedema ( 5.5 ) Fluid Accumulation and Impairment of Wound Healing ( 5.6 ) Hyperlipidemia ( 5.7 ) Decline in Renal Function ( 5.8 ) Proteinuria ( 5.9 ) Latent Viral Infections ( 5.10 ) Interstitial Lung Disease/Non-Infectious Pneumonitis ( 5.11 ) De Novo Use Without Cyclosporine ( 5.12 ) Increased Risk of Calcineurin Inhibitor-Induced Hemolytic Uremic Syndrome/ Thrombotic Thrombocytopenic Purpura/ Thrombotic Microangiopathy ( 5.13 ) Embryo-Fetal Toxicity: Can cause fetal harm.
Use of highly effective contraception is recommended for females of reproductive potential during treatment and for 12 weeks after final dose of sirolimus ( 5.15 , 8.1 ) Male Infertility: Azoospermia or oligospermia may occur ( 5.16 , 13.1 ) Immunizations: Avoid live vaccines ( 5.19 )
5.1Increased Susceptibility to Infection and the Possible Development of Lymphoma Increased susceptibility to infection and the possible development of lymphoma and other malignancies, particularly of the skin, may result from immunosuppression. The rates of lymphoma/lymphoproliferative disease observed in Studies 1 and 2 were 0.7–3.2% (for sirolimus-treated patients) versus 0.6–0.8% (azathioprine and placebo control) [ see Adverse Reactions (6.1) and (6.2) ]. Oversuppression of the immune system can also increase susceptibility to infection, including opportunistic infections such as tuberculosis, fatal infections, and sepsis.
Only physicians experienced in immunosuppressive therapy and management of organ transplant patients should use sirolimus for prophylaxis of organ rejection in patients receiving renal transplants. Patients receiving the drug should be managed in facilities equipped and staffed with adequate laboratory and supportive medical resources. The physician responsible for maintenance therapy should have complete information requisite for the follow-up of the patient.
5.2Liver Transplantation – Excess Mortality, Graft Loss, and Hepatic Artery Thrombosis The safety and efficacy of sirolimus as immunosuppressive therapy have not been established in liver transplant patients; therefore, such use is not recommended. The use of sirolimus has been associated with adverse outcomes in patients following liver transplantation, including excess mortality, graft loss and hepatic artery thrombosis (HAT). In a study in de novo liver transplant patients, the use of sirolimus in combination with tacrolimus was associated with excess mortality and graft loss (22% in combination versus 9% on tacrolimus alone).
Many of these patients had evidence of infection at or near the time of death. In this and another study in de novo liver transplant patients, the use of sirolimus in combination with cyclosporine or tacrolimus was associated with an increase in HAT (7% in combination versus 2% in the control arm); most cases of HAT occurred within 30 days post-transplantation, and most led to graft loss or death. In a clinical study in stable liver transplant patients 6 to 144 months post-liver transplantation and receiving a CNI-based regimen, an increased number of deaths was observed in the group converted to a sirolimus-based regimen compared to the group who was continued on a CNI-based regimen, although the difference was not statistically significant (3.8% versus 1.4%) [ see Clinical Studies (14.5) ].
5.3Lung Transplantation – Bronchial Anastomotic Dehiscence Cases of bronchial anastomotic dehiscence, most fatal, have been reported in de novo lung transplant patients when sirolimus has been used as part of an immunosuppressive regimen. The safety and efficacy of sirolimus as immunosuppressive therapy have not been established in lung transplant patients; therefore, such use is not recommended.
5.4Hypersensitivity Reactions Hypersensitivity reactions, including anaphylactic/anaphylactoid reactions, angioedema, exfoliative dermatitis and hypersensitivity vasculitis, have been associated with the administration o…
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the label. Increased susceptibility to infection, lymphoma, and malignancy [ see Boxed Warning , Warnings and Precautions (5.1) ] Excess mortality, graft loss, and hepatic artery thrombosis in liver transplant patients [ see Boxed Warning , Warnings and Precautions (5.2) ] Bronchial anastomotic dehiscence in lung transplant patients [ see Boxed Warning , Warnings and Precautions (5.3) ] Hypersensitivity reactions [ see Warnings and Precautions (5.4) ] Exfoliative dermatitis [ see Warnings and Precautions (5.4) ] Angioedema [ see Warnings and Precautions (5.5) ] Fluid accumulation and impairment of wound healing [ see Warnings and Precautions (5.6) ] Hypertriglyceridemia, hypercholesterolemia [ see Warnings and Precautions (5.7) ] Decline in renal function in long-term combination of cyclosporine with sirolimus[ see Warnings and Precautions (5.8) ] Proteinuria [ see Warnings and Precautions (5.9) ] Interstitial lung disease [ see Warnings and Precautions (5.11) ] Increased risk of calcineurin inhibitor-induced HUS/TTP/TMA [ see Warnings and Precautions (5.13) ] Embryo-fetal toxicity [ see Warnings and Precautions (5.15) ] Male infertility [ see Warnings and Precautions (5.16) ] The most common (≥30%) adverse reactions observed with sirolimus in clinical studies for organ rejection prophylaxis in recipients of renal transplantation are: peripheral edema, hypertriglyceridemia, hypertension, hypercholesterolemia, creatinine increased, constipation, abdominal pain, diarrhea, headache, fever, urinary tract infection, anemia, nausea, arthralgia, pain, and thrombocytopenia.
The most common (≥20%) adverse reactions observed with sirolimus in the clinical study for the treatment of LAM are: stomatitis, diarrhea, abdominal pain, nausea, nasopharyngitis, acne, chest pain, peripheral edema, upper respiratory tract infection, headache, dizziness, myalgia, and hypercholesterolemia. The following adverse reactions resulted in a rate of discontinuation of >5% in clinical trials for renal transplant rejection prophylaxis: creatinine increased, hypertriglyceridemia, and TTP. In patients with LAM, 11% of subjects discontinued due to adverse reactions, with no single adverse reaction leading to discontinuation in more than one patient being treated with sirolimus.
Prophylaxis of organ rejection in patients receiving renal transplants: Most common adverse reactions (incidence ≥30%) are peripheral edema, hypertriglyceridemia, hypertension, hypercholesterolemia, creatinine increased, abdominal pain, diarrhea, headache, fever, urinary tract infection, anemia, nausea, arthralgia, pain, and thrombocytopenia ( 6) . Lymphangioleiomyomatosis: Most common adverse reactions (incidence ≥20%) are stomatitis, diarrhea, abdominal pain, nausea, nasopharyngitis, acne, chest pain, peripheral edema, upper respiratory tract infection, headache, dizziness, myalgia, and hypercholesterolemia ( 6.6 ).
To report SUSPECTED ADVERSE REACTIONS, contact Rising Pharma Holdings, Inc. at 1-844-874-7464 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
6.1Clinical Studies Experience in Prophylaxis of Organ Rejection Following Renal Transplantation The safety and efficacy of sirolimus oral solution for the prevention of organ rejection following renal transplantation were assessed in two randomized, double-blind, multicenter, controlled trials [ see Clinical Studies (14.1) ]. The safety profiles in the two studies were similar. The incidence of adverse reactions in the randomized, double-blind, multicenter, placebo-controlled trial (Study 2) in which 219 renal transplant patients received sirolimus oral solution 2 mg/day, 208 received sirolimus oral solution 5 mg/day, and 124 received placebo is presented in Table 1 below.
The study population had a mean age of 46 years (range 15 to 71 years), the distribution was 67% male, and the composition by race was: White (78%), Black (1…
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS Sirolimus is known to be a substrate for both cytochrome P-450 3A4 (CYP3A4) and p-glycoprotein (P-gp). Inducers of CYP3A4 and P-gp may decrease sirolimus concentrations whereas inhibitors of CYP3A4 and P-gp may increase sirolimus concentrations. Avoid concomitant use with strong CYP3A4/P-gp inducers or strong CYP3A4/P-gp inhibitors that decrease or increase sirolimus concentrations ( 7.4 , 12.3 ).
Therapeutic drug monitoring and dose reduction for sirolimus should be considered when sirolimus is co-administered with cannabidiol ( 5.21 , 7.5 ). See full prescribing information for complete list of clinically significant drug interactions ( 12.3 ).
7.1Use with Cyclosporine Cyclosporine, a substrate and inhibitor of CYP3A4 and P-gp, was demonstrated to increase sirolimus concentrations when co-administered with sirolimus. In order to diminish the effect of this interaction with cyclosporine, it is recommended that sirolimus be taken 4 hours after administration of cyclosporine oral solution (MODIFIED) and/or cyclosporine capsules (MODIFIED). If cyclosporine is withdrawn from combination therapy with sirolimus, higher doses of sirolimus are needed to maintain the recommended sirolimus trough concentration ranges [ see Dosage and Administration (2.2) , Clinical Pharmacology (12.3) ].
7.2Strong Inducers and Strong Inhibitors of CYP3A4 and P-gp Avoid concomitant use of sirolimus with strong inducers (e.g., rifampin, rifabutin) and strong inhibitors (e.g., ketoconazole, voriconazole, itraconazole, erythromycin, telithromycin, clarithromycin) of CYP3A4 and P-gp. Alternative agents with lesser interaction potential with sirolimus should be considered [ see Warnings and Precautions (5.20) , Clinical Pharmacology (12.3) ].
7.3Grapefruit Juice Because grapefruit juice inhibits the CYP3A4-mediated metabolism of sirolimus, it must not be taken with or be used for dilution of sirolimus [ see Dosage and Administration (2.9) , Drug Interactions (7.3) , Clinical Pharmacology (12.3) ].
7.4Weak and Moderate Inducers or Inhibitors of CYP3A4 and P-gp Exercise caution when using sirolimus with drugs or agents that are modulators of CYP3A4 and P-gp. The dosage of sirolimus and/or the co-administered drug may need to be adjusted [ see Clinical Pharmacology (12.3) ]. Drugs that could increase sirolimus blood concentrations: Bromocriptine, cimetidine, cisapride, clotrimazole, danazol, diltiazem, fluconazole, letermovir, protease inhibitors (e.g., HIV and hepatitis C that include drugs such as ritonavir, indinavir, boceprevir, and telaprevir), metoclopramide, nicardipine, troleandomycin, verapamil Drugs and other agents that could decrease sirolimus concentrations: Carbamazepine, phenobarbital, phenytoin, rifapentine, St.
John's Wort ( Hypericum perforatum ) Drugs with concentrations that could increase when given with sirolimus: Verapamil
7.5Cannabidiol The blood levels of sirolimus may increase upon concomitant use with cannabidiol. When cannabidiol and sirolimus are co-administered, closely monitor for an increase in sirolimus blood levels and for adverse reactions suggestive of sirolimus toxicity. A dose reduction of sirolimus should be considered as needed when sirolimus is co-administered with cannabidiol [ see Dosage and Administration (2.5) and Warnings and Precautions (5.21) ].
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS Pregnancy: Based on animal data can cause fetal harm ( 5.15 , 8.1 ). Lactation: Potential for serious adverse effects in breastfed infants based on mechanism of action ( 8.2 ). Females and Males of Reproductive Potential: May impair fertility ( 8.1 , 8.3 , 13.1 ).
8.1Pregnancy Risk Summary Based on animal studies and the mechanism of action, sirolimus can cause fetal harm when administered to a pregnant woman [ see Data , Clinical Pharmacology (12.1) ]. There are limited data on the use of sirolimus during pregnancy; however, these data are insufficient to inform a drug-associated risk of adverse developmental outcomes. In animal studies, sirolimus was embryo/fetotoxic in rats at sub-therapeutic doses [ see Data ].
Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2–4% and 15–20%, respectively.
Data Animal Data Sirolimus crossed the placenta and was toxic to the conceptus. In rat embryo-fetal development studies, pregnant rats were administered sirolimus orally during the period of organogenesis (Gestational Day 6 to 15). Sirolimus produced embryo-fetal lethality at 0.5 mg/kg (2.5-fold the clinical dose of 2 mg, on a body surface area basis) and reduced fetal weight at 1 mg/kg (5-fold the clinical dose of 2 mg).
The no observed adverse effect level (NOAEL) for fetal toxicity in rats was 0.1 mg/kg (0.5-fold the clinical dose of 2 mg). Maternal toxicity (weight loss) was observed at 2 mg/kg (10-fold the clinical dose of 2 mg). The NOAEL for maternal toxicity was 1 mg/kg.
In combination with cyclosporine, rats had increased embryo-fetal mortality compared with sirolimus alone. In rabbit embryo-fetal development studies, pregnant rabbits were administered sirolimus orally during the period of organogenesis (Gestational Day 6 to 18). There were no effects on embryo-fetal development at doses up to 0.05 mg/kg (0.5-fold the clinical dose of 2 mg, on a body surface area basis); however, at doses of 0.05 mg/kg and above, the ability to sustain a successful pregnancy was impaired (i.e., embryo-fetal abortion or early resorption).
Maternal toxicity (decreased body weight) was observed at 0.05 mg/kg. The NOAEL for maternal toxicity was 0.025 mg/kg (0.25-fold the clinical dose of 2 mg). In a pre- and post-natal development study in rats, pregnant females were dosed during gestation and lactation (Gestational Day 6 through Lactation Day 20).
An increased incidence of dead pups, resulting in reduced live litter size, occurred at 0.5 mg/kg (2.5-fold the clinical dose of 2 mg/kg on a body surface area basis). At 0.1 mg/kg (0.5-fold the clinical dose of 2 mg), there were no adverse effects on offspring. Sirolimus did not cause maternal toxicity or affect developmental parameters in the surviving offspring (morphological development, motor activity, learning, or fertility assessment) at 0.5 mg/kg, the highest dose tested.
8.2Lactation Risk Summary It is not known whether sirolimus is present in human milk. There are no data on its effects on the breastfed infant or milk production. The pharmacokinetic and safety profiles of sirolimus in infants are not known.
Sirolimus is present in the milk of lactating rats. There is potential for serious adverse effects from sirolimus in breastfed infants based on mechanism of action [ see Clinical Pharmacology (12.1) ]. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for sirolimus and any potential adverse effects on the breastfed child from sirolimus.
8.3Females and Males of Reproductive Potential Contraception Females should not be pregnant or become pregnant while receiving sirolimus. Advise females of reproductive potential that animal studies have been s…
🤰 Pregnancy ▾
8.1Pregnancy Risk Summary Based on animal studies and the mechanism of action, sirolimus can cause fetal harm when administered to a pregnant woman [ see Data , Clinical Pharmacology (12.1) ]. There are limited data on the use of sirolimus during pregnancy; however, these data are insufficient to inform a drug-associated risk of adverse developmental outcomes. In animal studies, sirolimus was embryo/fetotoxic in rats at sub-therapeutic doses [ see Data ].
Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2–4% and 15–20%, respectively.
Data Animal Data Sirolimus crossed the placenta and was toxic to the conceptus. In rat embryo-fetal development studies, pregnant rats were administered sirolimus orally during the period of organogenesis (Gestational Day 6 to 15). Sirolimus produced embryo-fetal lethality at 0.5 mg/kg (2.5-fold the clinical dose of 2 mg, on a body surface area basis) and reduced fetal weight at 1 mg/kg (5-fold the clinical dose of 2 mg).
The no observed adverse effect level (NOAEL) for fetal toxicity in rats was 0.1 mg/kg (0.5-fold the clinical dose of 2 mg). Maternal toxicity (weight loss) was observed at 2 mg/kg (10-fold the clinical dose of 2 mg). The NOAEL for maternal toxicity was 1 mg/kg.
In combination with cyclosporine, rats had increased embryo-fetal mortality compared with sirolimus alone. In rabbit embryo-fetal development studies, pregnant rabbits were administered sirolimus orally during the period of organogenesis (Gestational Day 6 to 18). There were no effects on embryo-fetal development at doses up to 0.05 mg/kg (0.5-fold the clinical dose of 2 mg, on a body surface area basis); however, at doses of 0.05 mg/kg and above, the ability to sustain a successful pregnancy was impaired (i.e., embryo-fetal abortion or early resorption).
Maternal toxicity (decreased body weight) was observed at 0.05 mg/kg. The NOAEL for maternal toxicity was 0.025 mg/kg (0.25-fold the clinical dose of 2 mg). In a pre- and post-natal development study in rats, pregnant females were dosed during gestation and lactation (Gestational Day 6 through Lactation Day 20).
An increased incidence of dead pups, resulting in reduced live litter size, occurred at 0.5 mg/kg (2.5-fold the clinical dose of 2 mg/kg on a body surface area basis). At 0.1 mg/kg (0.5-fold the clinical dose of 2 mg), there were no adverse effects on offspring. Sirolimus did not cause maternal toxicity or affect developmental parameters in the surviving offspring (morphological development, motor activity, learning, or fertility assessment) at 0.5 mg/kg, the highest dose tested.
🧒 Pediatric Use ▾
8.4Pediatric Use Renal Transplant The safety and efficacy of sirolimus in pediatric patients <13 years have not been established. The safety and efficacy of sirolimus oral solution has been established for prophylaxis of organ rejection in renal transplantation in children ≥13 years judged to be at low- to moderate-immunologic risk. Use of sirolimus oral solution in this subpopulation of children ≥ 13 years is supported by evidence from adequate and well-controlled trials of sirolimus oral solution in adults with additional pharmacokinetic data in pediatric renal transplantation patients [ see Clinical Pharmacology (12.3) ].
Safety and efficacy information from a controlled clinical trial in pediatric and adolescent (< 18 years of age) renal transplant patients judged to be at high-immunologic risk, defined as a history of one or more acute rejection episodes and/or the presence of chronic allograft nephropathy, do not support the chronic use of sirolimus oral solution in combination with calcineurin inhibitors and corticosteroids, due to the higher incidence of lipid abnormalities and deterioration of renal function associated with these immunosuppressive regimens compared to calcineurin inhibitors, without increased benefit with respect to acute rejection, graft survival, or patient survival [ see Clinical Studies (14.6) ].
Lymphangioleiomyomatosis The safety and efficacy of sirolimus oral solution in pediatric patients <18 years have not been established.
🧓 Geriatric Use ▾
8.5Geriatric Use Clinical studies of sirolimus oral solution did not include sufficient numbers of patients ≥65 years to determine whether they respond differently from younger patients. Data pertaining to sirolimus trough concentrations suggest that dose adjustments based upon age in geriatric renal patients are not necessary. Differences in responses between the elderly and younger patients have not been identified.
In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, or cardiac function, and of concomitant disease or other drug therapy.
🆘 Overdosage ▾
10 OVERDOSAGE Reports of overdose with sirolimus have been received; however, experience has been limited. In general, the adverse effects of overdose are consistent with those listed in the adverse reactions section [ see Adverse Reactions (6) ]. General supportive measures should be followed in all cases of overdose.
Based on the low aqueous solubility and high erythrocyte and plasma protein binding of sirolimus, it is anticipated that sirolimus is not dialyzable to any significant extent. In mice and rats, the acute oral LD 50 was greater than 800 mg/kg.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism Of Action Sirolimus inhibits T-lymphocyte activation and proliferation that occurs in response to antigenic and cytokine (Interleukin [IL]-2, IL-4, and IL-15) stimulation by a mechanism that is distinct from that of other immunosuppressants. Sirolimus also inhibits antibody production. In cells, sirolimus binds to yhe immunophilin, FK Binding Protein-12 (FKBP-12), to generate an immunosuppressive complex.
The sirolimus:FKBP-12 complex has no effect on calcineurin activity. This complex binds to and inhibits the activation of the mammalian target of rapamycin (mTOR), a key regulatory kinase. This inhibition suppresses cytokine-driven T-cell proliferation, inhibiting the progression from the G1 to the S phase of the cell cycle.
Mammalian target of rapamycin (mTOR) inhibitors such as sirolimus have been shown in vitro to inhibit production of certain growth factors that may affect angiogenesis, fibroblast proliferation, and vascular permeability. Studies in experimental models show that sirolimus prolongs allograft (kidney, heart, skin, islet, small bowel, pancreatico-duodenal, and bone marrow) survival in mice, rats, pigs, and/or primates. Sirolimus reverses acute rejection of heart and kidney allografts in rats and prolongs the graft survival in presensitized rats.
In some studies, the immunosupressive effect of sirolimus lasts up to 6 months after discontinuation of therapy. This tolerization effect is alloantigen-specific. In rodent models of autoimmune disease, sirolimus suppresses immune-mediated events associated with systemic lupus erythematosus, collagen-induced arthritis, autoimmune type I diabetes, autoimmune myocarditis, experimental allergic encephalomyelitis, graft-versus-host disease, and autoimmune uveoretinitis.
Lymphangioleiomyomatosis involves lung tissue infiltration with smooth muscle-like cells that harbor inactivating mutations of the tuberous sclerosis complex (TSC) gene (LAM cells). Loss of TSC gene function activates the mTOR signaling pathway, resulting in cellular proliferation and release of lymphangiogenic growth factors. Sirolimus inhibits the activated mTOR pathway and thus the proliferation of LAM cells.
12.2Pharmacodynamics Orally-administered sirolimus, at doses of 2 mg/day and 5 mg/day, significantly reduced the incidence of organ rejection in low- to moderate-immunologic risk renal transplant patients at 6 months following transplantation compared with either azathioprine or placebo [see Clinical Studies (14.1)]. There was no demonstrable efficacy advantage of a daily maintenance dose of 5 mg with a loading dose of 15 mg over a daily maintenance dose of 2 mg with a loading dose of 6 mg. Therapeutic drug monitoring should be used to maintain sirolimus drug levels within the target-range [see Dosage and Administration (2.5)].
12.3Pharmacokinetics Sirolimus pharmacokinetics activity have been determined following oral administration in healthy subjects, pediatric patients, hepatically impaired patients, and renal transplant patients. The pharmacokinetic parameters of sirolimus in low- to moderate-immunologic risk adult renal transplant patients following multiple dosing with sirolimus 2 mg daily, in combination with cyclosporine and corticosteriods, is summarized in Table 4. TABLE 4: MEAN ± SD STEADY STATE SIROLIMUS PHARMACOKINETIC PARAMETERS IN LOW-TO MODERATE-IMMUNOLOGIC RISK ADULT RENAL TRANSPLANT PATIENTS FOLLOWING SIROLIMUS 2 MG DAILY a,b a: In presence of cyclosporine administered 4 hours before sirolimus dosing. b: Based on data collected at months 1 and 3 post-transplantation. c: Average Cmin over 6 months.
Whole blood trough sirolimus concentrations, as measured by LC/MS/MS in renal transplant patients, were significantly correlated with AUC τ,ss . Upon repeated, twice-daily administration without an initial loading dose in a multiple-dose study, the average trough concentration of sirolimus increases approximately 2- to 3-fold over the initial 6…
🧬 Mechanism of Action ▾
12.1Mechanism Of Action Sirolimus inhibits T-lymphocyte activation and proliferation that occurs in response to antigenic and cytokine (Interleukin [IL]-2, IL-4, and IL-15) stimulation by a mechanism that is distinct from that of other immunosuppressants. Sirolimus also inhibits antibody production. In cells, sirolimus binds to yhe immunophilin, FK Binding Protein-12 (FKBP-12), to generate an immunosuppressive complex.
The sirolimus:FKBP-12 complex has no effect on calcineurin activity. This complex binds to and inhibits the activation of the mammalian target of rapamycin (mTOR), a key regulatory kinase. This inhibition suppresses cytokine-driven T-cell proliferation, inhibiting the progression from the G1 to the S phase of the cell cycle.
Mammalian target of rapamycin (mTOR) inhibitors such as sirolimus have been shown in vitro to inhibit production of certain growth factors that may affect angiogenesis, fibroblast proliferation, and vascular permeability. Studies in experimental models show that sirolimus prolongs allograft (kidney, heart, skin, islet, small bowel, pancreatico-duodenal, and bone marrow) survival in mice, rats, pigs, and/or primates. Sirolimus reverses acute rejection of heart and kidney allografts in rats and prolongs the graft survival in presensitized rats.
In some studies, the immunosupressive effect of sirolimus lasts up to 6 months after discontinuation of therapy. This tolerization effect is alloantigen-specific. In rodent models of autoimmune disease, sirolimus suppresses immune-mediated events associated with systemic lupus erythematosus, collagen-induced arthritis, autoimmune type I diabetes, autoimmune myocarditis, experimental allergic encephalomyelitis, graft-versus-host disease, and autoimmune uveoretinitis.
Lymphangioleiomyomatosis involves lung tissue infiltration with smooth muscle-like cells that harbor inactivating mutations of the tuberous sclerosis complex (TSC) gene (LAM cells). Loss of TSC gene function activates the mTOR signaling pathway, resulting in cellular proliferation and release of lymphangiogenic growth factors. Sirolimus inhibits the activated mTOR pathway and thus the proliferation of LAM cells.
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING Since sirolimus oral solution is not absorbed through the skin, there are no special precautions. However, if direct contact of the oral solution occurs with the skin or eyes, wash skin thoroughly with soap and water; rinse eyes with plain water. Do not use sirolimus oral solution after the expiration date. The expiration date refers to the last day of that month.
16.1Sirolimus Oral Solution Each Sirolimus Oral Solution carton, NDC 16571-806-06, contains one 2 oz (60 mL fill) amber glass bottle of sirolimus (concentration of 1 mg/mL), one oral syringe adapter for fitting into the neck of the bottle, sufficient disposable amber oral syringes and caps for daily dosing, and a carrying case. Sirolimus Oral Solution bottles should be stored protected from light and refrigerated at 2°C to 8°C (36°F to 46°F). Once the bottle is opened, the contents should be used within one month.
If necessary, the patient may store the bottles at room temperatures up to 25°C (77°F) for a short period of time (e.g., not more than 15 days for the bottles). An amber syringe and cap are provided for dosing, and the product may be kept in the syringe for a maximum of 24 hours at room temperatures up to 25°C (77°F) or refrigerated at 2°C to 8°C (36°F to 46°F). The syringe should be discarded after one use.
After dilution, the preparation should be used immediately. Sirolimus Oral Solution provided in bottles may develop a slight haze when refrigerated. If such a haze occurs, allow the product to stand at room temperature and shake gently until the haze disappears.
The presence of this haze does not affect the quality of the product.
📋 Description ▾
11 DESCRIPTION Sirolimus is an mTOR inhibitor immunosuppressive agent. Sirolimus is a macrocyclic lactone produced by Streptomyces hygroscopicus . The chemical name of sirolimus (also known as rapamycin) is (3 S ,6 R ,7 E ,9 R ,10 R ,12 R ,14 S ,15 E ,17 E ,19 E ,21 S ,23 S ,26 R ,27 R ,34a S )-9,10,12,13,14,21,22,23,24,25,26,27,32,33,34, 34a-hexadecahydro-9,27-dihydroxy-3-[(1 R )-2-[(1 S ,3 R ,4 R )-4-hydroxy-3-methoxycyclohexyl]-1-methylethyl]-10,21-dimethoxy-6,8,12,14,20,26-hexamethyl-23,27-epoxy-3H-pyrido[2,1-c][1,4] oxaazacyclohentriacontine-1,5,11,28,29 (4 H ,6 H ,31 H )-pentone.
Its molecular formula is C 51 H 79 NO 13 and its molecular weight is 914.2. The structural formula of sirolimus is illustrated as follows. Sirolimus is a white to off-white powder and is insoluble in water, but freely soluble in chloroform, acetone, and acetonitrile.
Sirolimus oral solution is available for administration as an oral solution containing 1 mg/mL sirolimus. The inactive ingredients in sirolimus oral solution are Phosal 50 PG ® (phosphatidylcholine, propylene glycol, mono- and di-glycerides, ethanol, soy fatty acids, and ascorbyl palmitate) and polysorbate 80. Sirolimus oral solution contains 1.5% – 2.5% ethanol. sirolimusstruct.jpg
💬 Information for Patients ▾
17 PATIENT COUNSELING INFORMATION Advise patients, their families, and their caregivers to read the Medication Guide and Instructions for Use for the Oral Solution and assist them in understanding its contents. The complete text of the Medication Guide and Instructions for Use for the Oral Solution are reprinted at the end of the document. See FDA-Approved Medication Guide and Instructions for Use for the Oral Solution.
17.1Dosage Patients should be given complete dosage instructions [ see FDA-Approved Medication Guide ].
17.2Skin Cancer Events Advise patients that exposure to sunlight and ultraviolet (UV) light should be limited by wearing protective clothing and using a broad spectrum sunscreen with a high protection factor because of the increased risk for skin cancer [ see Warnings and Precautions (5.18) ].
17.3Pregnancy and Lactation Advise female patients of reproductive potential to avoid becoming pregnant throughout treatment and for 12 weeks after sirolimus therapy has stopped. Sirolimus can cause fetal harm if taken during pregnancy. Advise a pregnant woman of the potential risk to her fetus.
Before making a decision to breastfeed, inform the patient that the effects of breastfeeding in infants while taking this drug are unknown, but there is potential for serious adverse effects [ see Warnings and Precautions (5.15 ), Use in Specific Populations (8.1 , 8.2 , 8.3 ) ].
17.4Infertility Inform male and female patients that sirolimus may impair fertility [ see Warnings and Precautions (5.16) , Adverse Reactions (6.7) , Use in Specific Populations (8.1 , 8.3 ), Nonclinical Toxicology (13.1 ) ]. This product's label may have been updated. For current Full Prescribing Information, please contact Rising Pharma Holdings, Inc. at 1-844-874-7464.
Manufactured for: Rising Pharma Holdings, Inc. East Brunswick, NJ 08816 Made in India Neutral code: 4323147/TS/DRUGS/2025 Revised: 08/2025 PIR80606-04
💬 Medication Guide ▾
MEDICATION GUIDE Sirolimus (sir oh' li mus) Oral Solution What is the most important information I should know about sirolimus oral solution? Sirolimus oral solution can cause serious side effects, including: 1. Increased risk of getting infections.
Serious infections can happen including infections caused by viruses, bacteria, and fungi (yeast). Your doctor may put you on medicine to help prevent some of these infections. Call your doctor right away if you have symptoms of infection including fever or chills while taking sirolimus oral solution.
2. Increased risk of getting certain cancers. People who take sirolimus oral solution have a higher risk of getting lymphoma, and other cancers, especially skin cancer.
Talk with your doctor about your risk for cancer. Sirolimus oral solution has not been shown to be safe and effective in people who have had liver or lung transplants. Serious complications and death may happen in people who take sirolimus oral solution after a liver or lung transplant.
You should not take sirolimus oral solution if you have had a liver or lung transplant without talking with your doctor. See the section " What are the possible side effects of sirolimus oral solution? " for information about other side effects of sirolimus oral solution. What is sirolimus oral solution?
Sirolimus oral solution is a prescription medicine used to prevent rejection (anti-rejection medicine) in people 13 years of age and older who have received a kidney transplant. Rejection is when your body's immune system recognizes the new organ as a "foreign" threat and attacks it. Sirolimus oral solution is used with other medicines called cyclosporine (Gengraf, Neoral, Sandimmune), and corticosteroids.
Your doctor will decide: if sirolimus oral solution is right for you, and how to best use it with cyclosporine and corticosteroids after your transplant. It is not known if sirolimus oral solution is safe and effective in children under 13 years of age. Sirolimus oral solution is a prescription medicine also used to treat lymphangioleiomyomatosis (LAM).
LAM is a rare progressive lung disease that affects predominantly women of childbearing age. Who should not take sirolimus oral solution? Do not take sirolimus oral solution if you are allergic to sirolimus or any of the other ingredients in sirolimus oral solution.
See the end of this leaflet for a complete list of ingredients in sirolimus oral solution. What should I tell my doctor before taking sirolimus oral solution? have liver problems have skin cancer or it runs in your family have high cholesterol or triglycerides (fat in your blood) are pregnant or are a female who can become pregnant. Sirolimus oral solution can harm your unborn baby.
You should not become pregnant during treatment with sirolimus oral solution and for 12 weeks after ending treatment with sirolimus oral solution. In order to avoid pregnancy, a female who can get pregnant should use effective birth control during treatment and for 12 weeks after your final dose of sirolimus oral solution. Talk with your doctor about what birth control method is right for you during this time.
Tell your doctor right away if you become pregnant or think you are pregnant during treatment with sirolimus oral solution or within 12 weeks after your final dose of sirolimus oral solution. It is not known whether sirolimus passes into breast milk; however, there is a risk of serious side effects in breastfed infants. You and your doctor should decide about the best way to feed your baby if you take sirolimus oral solution.
Tell your doctor about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal supplements. Using sirolimus oral solution with certain medicines may affect each other causing serious side effects. Sirolimus oral solution may affect the way other medicines work, and other medicines may affect how sirolimus oral solution works.
Especially tell your doctor if you take: a med…