Famotidine 40 mg Tablet, 100-count
Other active recalls for Famotidine (different manufacturers) — 2 · tap to view
🆔 Identity & classification
Where does this data come from?
🏷️ RxNorm drug class
This medicine belongs to the Histamine-2 Receptor Antagonist class.
Where does this data come from?
🏭 Manufacturer & labeler
Where does this data come from?
🩺 Clinical
Prescription famotidine is used to treat ulcers (sores on the lining of the stomach or small intestine); gastroesophageal reflux disease (GERD, a condition in which backward flow of acid from the stomach causes heartburn and injury of the esophagus [tube that connects the mouth and stomach]); and conditions where the stomach produces too much acid, such as Zollinger-Ellison syndrome (tumors in the pancreas or small intestine that cause increased production of stomach acid). Over-the-counter famotidine is used to prevent and treat heartburn due to acid indigestion and sour stomach caused by eat...
Read the full MedlinePlus article ↗- Great question. Antacids (like Tums) neutralize acid that's already in your stomach — they work fast but don't last long. Famotidine is different: it actually blocks a signal in yo...
- What exactly does famotidine do — and how is it different from antacids?
- The over-the-counter tablets are meant to relieve heartburn when it happens, or to prevent it if you take them 10 to 60 minutes before a meal that usually causes trouble. You shoul...
- Can I take the OTC version whenever I have heartburn, or is there a limit?
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Famotidine — tap one for details:
Famotidine may be associated with lower levels of 6 nutrients — worth a chat with your pharmacist, not a cause for alarm.
Where does this data come from?
Ask a licensed pharmacist directly — free, answered by our team.
💊 What it looks like
Where does this data come from?
🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
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UNII 1K09F3G675
Ferric oxide red is an inorganic iron compound used as a colorant in medicines. It gives tablets, capsules, or other dosage forms a red or reddish tint for identification and appearance.
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UNII 1DI56QDM62
A natural fatty substance from soybeans that helps mix oil and water-based ingredients together. It acts as an emulsifier and lubricant in medicines to improve texture and help the product break down properly in your body.
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UNII 70097M6I30
Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII G2M7P15E5P
Polyethylene glycol 3350 is a synthetic polymer used as a solvent, humectant, and thickening agent in medicines. It helps dissolve other ingredients, retain moisture in the product, and achieve the desired consistency.
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UNII 532B59J990
Polyvinyl alcohol is a synthetic polymer made from plant-derived materials. It's used as a binder to hold ingredients together, a film-former in coatings, and a thickener in liquid formulations.
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UNII ETJ7Z6XBU4
Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
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UNII O8232NY3SJ
A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.
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UNII 7SEV7J4R1U
A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
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UNII 15FIX9V2JP
Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.
10 inactive ingredients listed in the exact product block matched to this NDC.
Where does this data come from?
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
Are inactive ingredients the same for every manufacturer?
Why might an inactive ingredient be missing?
Can inactive ingredients matter?
💲 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 each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| 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 | $0.0827 | $8.27 / 100 tablets |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Famotidine 40 mg 00172-5729-60 | Teva | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 31722-0018-01 | Camber | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 50268-0304-15 | AvPAK | 50 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 61442-0122-01 | Carlsbad | 2400 tablets | $0.049 | AB | Availability likely | — |
| famotidine 40 mg 62135-0808-90 | Chartwell | 90 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 64980-0624-01 | Rising | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 65862-0860-01 | Aurobindo | 100 tablets | $0.049 | — | Availability likely | — |
| Famotidine 40 mg 67877-0843-01 | Ascend | 100 tablets | $0.049 | AB | Discontinued | — |
| Famotidine 40 mg 67877-0889-01 | Ascend | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 68001-0398-00 | BluePoint | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 69367-0401-10 | Westminster | 1000 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 70710-1684-00 | Zydus | 1000 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 70756-0052-11 | Lifestar | 100 tablets | $0.049 | AB | Availability likely | — |
| Famotidine 40 mg 72205-0146-05 | Novadoz | 500 tablets | $0.049 | AB | Availability likely | — |
| Pepcid 40 mg 00187-4440-10 | Bausch | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 00615-8559-05 | NCS | 15 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 10267-5690-01 | Contract | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 43063-0533-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 43063-0696-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mgthis 46708-0294-10 | Alembic | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-1432-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-6790-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-6916-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-7196-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-7966-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-7981-00 | A-S | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 50090-7982-00 | A-S | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 51407-0684-01 | Golden | 3600 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 51655-0102-26 | Northwind | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 55111-0120-01 | Dr.Reddy's | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 60760-0736-60 | St. | 60 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 60760-0843-07 | ST. | 7 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 60760-0937-07 | ST. | 7 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 62332-0002-10 | Alembic | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 63187-0908-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 63629-2014-01 | Bryant | 1000 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 63629-2015-01 | Bryant | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 63629-2782-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68071-3413-03 | NuCare | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68071-3521-03 | NuCare | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68071-3584-03 | NuCare | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68071-4197-03 | NuCare | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68788-8518-03 | Preferred | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68788-8733-03 | Preferred | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 70518-4084-01 | REMEDYREPACK | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 70518-4394-00 | REMEDYREPACK | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 70771-1703-00 | Zydus | 1000 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71205-0257-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71205-0634-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71205-0781-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71335-0231-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71335-2442-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71335-2527-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71335-9615-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 71335-9724-01 | Bryant | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72162-1737-00 | Bryant | 1000 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72189-0207-30 | direct | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72789-0345-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72789-0427-90 | PD-Rx | 90 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72789-0453-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72865-0215-01 | XLCare | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 76420-0713-01 | Asclemed | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 82804-0228-30 | Proficient | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 82804-0981-00 | Proficient | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 85766-0222-01 | Sportpharm | 100 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 85534-0092-00 | HAWAII | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 68788-4144-03 | Preferred | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 72789-0589-30 | PD-Rx | 30 tablets | — | AB | FDA listed | — |
| Famotidine 40 mg 67296-2330-02 | Redpharm | 20 tablets | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 46708-0294-10 You're viewing this | 100 TABLET in 1 CARTON (46708-294-10) | 2016-01-29 | Active |
| 46708-0294-30 | 30 TABLET in 1 BOTTLE (46708-294-30) | 2016-01-29 | Active |
| 46708-0294-31 | 100 TABLET in 1 BOTTLE (46708-294-31) | 2016-01-29 | Active |
| 46708-0294-71 | 500 TABLET in 1 BOTTLE (46708-294-71) | 2016-01-29 | Active |
| 46708-0294-91 | 1000 TABLET in 1 BOTTLE (46708-294-91) | 2016-01-29 | Active |
Pack size FAQ
What quantity is in NDC 46708-0294-10?
What is the difference between NDC 46708-0294-10 and NDC 46708-0294-30?
What NDC number is used to bill for this package of Famotidine 40 mg Tablet?
🧭 About this NDC listing & data coverage
What data is (and isn’t) available for this NDC — tap to expand
| 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) | — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey. |
| Orange Book / therapeutic-equivalence data | ✓ Available |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
| Medicaid utilization (CMS SDUD) | — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold. |
Questions about this listing
Why is there no price listed?
Is the NDC printed on the package the same as the 11-digit billing NDC?
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Do I need a prescription for this product?
Where does this data come from?
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Famotidine is indicated in: 1. Short-term treatment of active duodenal ulcer. Most adult patients heal within 4 weeks; there is rarely reason to use famotidine at full dosage for longer than 6 to 8 weeks.
Studies have not assessed the safety of famotidine in uncomplicated active duodenal ulcer for periods of more than eight weeks. 2. Maintenance therapy for duodenal ulcer patients at reduced dosage after healing of an active ulcer.
Controlled studies in adults have not extended beyond one year. 3. Short-term treatment of active benign gastric ulcer.
Most adult patients heal within 6 weeks. Studies have not assessed the safety or efficacy of famotidine in uncomplicated active benign gastric ulcer for periods of more than 8 weeks. 4.
Short-term treatment of gastroesophageal reflux disease (GERD). Famotidine is indicated for short-term treatment of patients with symptoms of GERD (see CLINICAL PHARMACOLOGY IN ADULTS , Clinical Studies ). Famotidine is also indicated for the short-term treatment of esophagitis due to GERD including erosive or ulcerative disease diagnosed by endoscopy (see CLINICAL PHARMACOLOGY IN ADULTS , Clinical Studies ).
5. Treatment of pathological hypersecretory conditions (e.g., Zollinger-Ellison Syndrome, multiple endocrine adenomas) (see CLINICAL PHARMACOLOGY IN ADULTS , Clinical Studies ) .
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION Duodenal Ulcer Acute Therapy: The recommended adult oral dosage for active duodenal ulcer is 40 mg once a day at bedtime. Most patients heal within 4 weeks; there is rarely reason to use famotidine at full dosage for longer than 6 to 8 weeks. A regimen of 20 mg b.i.d. is also effective.
Maintenance Therapy: The recommended adult oral dose is 20 mg once a day at bedtime. Benign Gastric Ulcer Acute Therapy: The recommended adult oral dosage for active benign gastric ulcer is 40 mg once a day at bedtime. Gastroesophageal Reflux Disease (GERD) The recommended oral dosage for treatment of adult patients with symptoms of GERD is 20 mg b.i.d. for up to 6 weeks.
The recommended oral dosage for the treatment of adult patients with esophagitis including erosions and ulcerations and accompanying symptoms due to GERD is 20 or 40 mg b.i.d. for up to 12 weeks (see CLINICAL PHARMACOLOGY IN ADULTS , Clinical Studies ). Dosage for Pediatric Patients <1 year of age Gastroesophageal Reflux Disease (GERD) See PRECAUTIONS , Pediatric Patients <1 year of age. The studies described in PRECAUTIONS, Pediatric Patients <1 year of age suggest the following starting doses in pediatric patients <1 year of age: Gastroesophageal Reflux Disease (GERD) - 0.5 mg/kg/dose of famotidine oral suspension for the treatment of GERD for up to 8 weeks once daily in patients <3 months of age and 0.5 mg/kg/dose twice daily in patients 3 months to <1 year of age.
Patients should also be receiving conservative measures (e.g., thickened feedings). The use of intravenous famotidine in pediatric patients <1 year of age with GERD has not been adequately studied. Dosage for Pediatric Patients 1 to 16 years of age See PRECAUTIONS , Pediatric Patients 1 to 16 years of age.
The studies described in PRECAUTIONS, Pediatric Patients 1 to 16 years of age suggest the following starting doses in pediatric patients 1 to 16 years of age: Peptic ulcer - 0.5 mg/kg/day p.o. at bedtime or divided b.i.d. up to 40 mg/day. Gastroesophageal Reflux Disease with or without esophagitis including erosions and ulcerations - 1 mg/kg/day p.o. divided b.i.d. up to 40 mg b.i.d. While published uncontrolled studies suggest effectiveness of famotidine in the treatment of gastroesophageal reflux disease and peptic ulcer, data in pediatric patients are insufficient to establish percent response with dose and duration of therapy.
Therefore, treatment duration (initially based on adult duration recommendations) and dose should be individualized based on clinical response and/or pH determination (gastric or esophageal) and endoscopy. Published uncontrolled clinical studies in pediatric patients 1 to 16 years of age have employed doses up to 1 mg/kg/day for peptic ulcer and 2 mg/kg/day for GERD with or without esophagitis including erosions and ulcerations. Pathological Hypersecretory Conditions (e.g., Zollinger-Ellison Syndrome, Multiple Endocrine Adenomas) The dosage of famotidine in patients with pathological hypersecretory conditions varies with the individual patient.
The recommended adult oral starting dose for pathological hypersecretory conditions is 20 mg q 6 h. In some patients, a higher starting dose may be required. Doses should be adjusted to individual patient needs and should continue as long as clinically indicated.
Doses up to 160 mg q 6 h have been administered to some adult patients with severe Zollinger-Ellison Syndrome. Concomitant Use of Antacids Antacids may be given concomitantly if needed. Dosage Adjustment for Patients with Moderate or Severe Renal Insufficiency In adult patients with moderate (creatinine clearance <50 mL/min) or severe (creatinine clearance <10 mL/min) renal insufficiency, the elimination half-life of famotidine is increased.
For patients with severe renal insufficiency, it may exceed 20 hours, reaching approximately 24 hours in anuric patients. Since CNS adverse effects have been reported in patients with moderate and severe renal insufficienc…
⛔ Contraindications ▾
CONTRAINDICATIONS Hypersensitivity to any component of these products. Cross sensitivity in this class of compounds has been observed. Therefore, famotidine should not be administered to patients with a history of hypersensitivity to other H 2 -receptor antagonists.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS The adverse reactions listed below have been reported during domestic and international clinical trials in approximately 2500 patients. In those controlled clinical trials in which famotidine Tablets were compared to placebo, the incidence of adverse experiences in the group which received famotidine Tablets, 40 mg at bedtime, was similar to that in the placebo group. The following adverse reactions have been reported to occur in more than 1% of patients on therapy with famotidine in controlled clinical trials, and may be causally related to the drug: headache (4.7%), dizziness (1.3%), constipation (1.2%) and diarrhea (1.7%).
The following other adverse reactions have been reported infrequently in clinical trials or since the drug was marketed. The relationship to therapy with Famotidine has been unclear in many cases. Within each category the adverse reactions are listed in order of decreasing severity: Body as a Whole: fever, asthenia, fatigue Cardiovascular: arrhythmia, AV block, palpitation.
Prolonged QT interval, in patients with impaired renal function, has been reported very rarely. Gastrointestinal: cholestatic jaundice, hepatitis, liver enzyme abnormalities, vomiting, nausea, abdominal discomfort, anorexia, dry mouth Hematologic: rare cases of agranulocytosis, pancytopenia, leukopenia, thrombocytopenia Hypersensitivity: anaphylaxis, angioedema, orbital or facial edema, urticaria, rash, conjunctival injection Musculoskeletal: musculoskeletal pain including muscle cramps, arthralgia Nervous System/Psychiatric : grand mal seizure; psychic disturbances, which were reversible in cases for which follow-up was obtained, including hallucinations, confusion, agitation, depression, anxiety, decreased libido; paresthesia; insomnia; somnolence.
Convulsions, in patients with impaired renal function, have been reported very rarely. Respiratory: bronchospasm, interstitial pneumonia Skin: toxic epidermal necrolysis / Stevens Johnson syndrome (very rare), alopecia, acne, pruritus, dry skin, flushing Special Senses: tinnitus, taste disorder Other: rare cases of impotence and rare cases of gynecomastia have been reported; however, in controlled clinical trials, the incidences were not greater than those seen with placebo. Pediatric Patients In a clinical study in 35 pediatric patients <1 year of age with GERD symptoms [e.g., vomiting (spitting up), irritability (fussing)], agitation was observed in 5 patients on famotidine that resolved when the medication was discontinued.
🔄 Drug Interactions ▾
Drug Interactions No drug interactions have been identified. Studies with famotidine in man, in animal models, and in vitro have shown no significant interference with the disposition of compounds metabolized by the hepatic microsomal enzymes, e.g., cytochrome P450 system. Compounds tested in man include warfarin, theophylline, phenytoin, diazepam, aminopyrine and antipyrine.
Indocyanine green as an index of hepatic drug extraction has been tested and no significant effects have been found.
🤰 Pregnancy ▾
Pregnancy Pregnancy Category B Reproductive studies have been performed in rats and rabbits at oral doses of up to 2000 and 500 mg/kg/day, respectively, and in both species at I.V. doses of up to 200 mg/kg/day, and have revealed no significant evidence of impaired fertility or harm to the fetus due to famotidine. While no direct fetotoxic effects have been observed, sporadic abortions occurring only in mothers displaying marked decreased food intake were seen in some rabbits at oral doses of 200 mg/kg/day (250 times the usual human dose) or higher.
There are, however, no adequate or well controlled studies in pregnant women. Because animal reproductive studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
🧓 Geriatric Use ▾
Geriatric Use Of the 4,966 subjects in clinical studies who were treated with famotidine, 488 subjects (9.8%) were 65 and older, and 88 subjects (1.7%) were greater than 75 years of age. No overall differences in safety or effectiveness were observed between these subjects and younger subjects. However, greater sensitivity of some older individuals cannot be ruled out.
No dosage adjustment is required based on age (see CLINICAL PHARMACOLOGY IN ADULTS , Pharmacokinetics ). This drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.
Dosage adjustment in the case of moderate or severe renal impairment is necessary (see PRECAUTIONS , Patients with Moderate or Severe Renal Insufficiency and DOSAGE AND ADMINISTRATION , Dosage Adjustment forPatients with Moderate or Severe Renal Insufficiency ).
🆘 Overdosage ▾
OVERDOSAGE The adverse reactions in overdose cases are similar to the adverse reactions encountered in normal clinical experience (see ADVERSE REACTIONS ). Oral doses of up to 640 mg/day have been given to adult patients with pathological hypersecretory conditions with no serious adverse effects. In the event of overdosage, treatment should be symptomatic and supportive.
Unabsorbed material should be removed from the gastrointestinal tract, the patient should be monitored, and supportive therapy should be employed. The oral LD 50 of famotidine in male and female rats and mice was greater than 3000 mg/kg and the minimum lethal acute oral dose in dogs exceeded 2000 mg/kg. Famotidine did not produce overt effects at high oral doses in mice, rats, cats and dogs, but induced significant anorexia and growth depression in rabbits starting with 200 mg/kg/day orally.
The intravenous LD 50 of famotidine for mice and rats ranged from 254 to 563 mg/kg and the minimum lethal single I.V. dose in dogs was approximately 300 mg/kg. Signs of acute intoxication in I.V. treated dogs were emesis, restlessness, pallor of mucous membranes or redness of mouth and ears, hypotension, tachycardia and collapse.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY IN ADULTS GI Effects Famotidine is a competitive inhibitor of histamine H 2 -receptors. The primary clinically important pharmacologic activity of famotidine is inhibition of gastric secretion. Both the acid concentration and volume of gastric secretion are suppressed by famotidine, while changes in pepsin secretion are proportional to volume output.
In normal volunteers and hypersecretors, famotidine inhibited basal and nocturnal gastric secretion, as well as secretion stimulated by food and pentagastrin. After oral administration, the onset of the antisecretory effect occurred within one hour; the maximum effect was dose-dependent, occurring within one to three hours. Duration of inhibition of secretion by doses of 20 and 40 mg was 10 to 12 hours.
Single evening oral doses of 20 and 40 mg inhibited basal and nocturnal acid secretion in all subjects; mean nocturnal gastric acid secretion was inhibited by 86% and 94%, respectively, for a period of at least 10 hours. The same doses given in the morning suppressed food-stimulated acid secretion in all subjects. The mean suppression was 76% and 84%, respectively, 3 to 5 hours after administration, and 25% and 30%, respectively, 8 to 10 hours after administration.
In some subjects who received the 20 mg dose, however, the antisecretory effect was dissipated within 6 to 8 hours. There was no cumulative effect with repeated doses. The nocturnal intragastric pH was raised by evening doses of 20 and 40 mg of famotidine to mean values of 5 and 6.4, respectively.
When famotidine was given after breakfast, the basal daytime interdigestive pH at 3 and 8 hours after 20 or 40 mg of famotidine was raised to about 5. Famotidine had little or no effect on fasting or postprandial serum gastrin levels. Gastric emptying and exocrine pancreatic function were not affected by famotidine.
Other Effects Systemic effects of famotidine in the CNS, cardiovascular, respiratory or endocrine systems were not noted in clinical pharmacology studies. Also, no antiandrogenic effects were noted. (See ADVERSE REACTIONS .) Serum hormone levels, including prolactin, cortisol, thyroxine (T 4 ), and testosterone, were not altered after treatment with famotidine.
Pharmacokinetics Famotidine is incompletely absorbed. The bioavailability of oral doses is 40 to 45%. Bioavailability may be slightly increased by food, or slightly decreased by antacids; however, these effects are of no clinical consequence.
Famotidine undergoes minimal first-pass metabolism. After oral doses, peak plasma levels occur in 1 to 3 hours. Plasma levels after multiple doses are similar to those after single doses.
Fifteen to 20% of famotidine in plasma is protein bound. Famotidine has an elimination half-life of 2.5 to 3.5 hours. Famotidine is eliminated by renal (65 to 70%) and metabolic (30 to 35%) routes.
Renal clearance is 250 to 450 mL/min, indicating some tubular excretion. Twenty-five to 30% of an oral dose and 65 to 70% of an intravenous dose are recovered in the urine as unchanged compound. The only metabolite identified in man is the S-oxide.
There is a close relationship between creatinine clearance values and the elimination half-life of famotidine. In patients with severe renal insufficiency, i.e., creatinine clearance less than 10 mL/min, the elimination half-life of famotidine may exceed 20 hours and adjustment of dose or dosing intervals in moderate and severe renal insufficiency may be necessary (see PRECAUTIONS , DOSAGE AND ADMINISTRATION ). In elderly patients, there are no clinically significant age-related changes in the pharmacokinetics of famotidine.
However, in elderly patients with decreased renal function, the clearance of the drug may be decreased (see PRECAUTIONS , Geriatric Use ). Clinical Studies Duodenal Ulcer In a U.S. multicenter, double-blind study in outpatients with endoscopically confirmed duodenal ulcer, orally administered famotidine was compared to placebo. As shown in Table 1, 70% of…
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Famotidine Tablets, USP, 20 mg, are yellow colored, circular, biconvex film-coated tablets embossed with 'L113'on one side and '20' on the other side. NDC 46708-293-30 bottles of 30 tablets with child-resistant closure NDC 46708-293-31 bottles of 100 tablets with child-resistant closure NDC 46708-293-71 bottles of 500 NDC 46708-293-91 bottles of 1000 NDC 46708-293-10 Unit dose tablets of 100 (10 x 10) Famotidine Tablets, USP, 40 mg, are brown colored, circular, biconvex film-coated tablets embossed with 'L114'on one side and '40' on the other side.
NDC 46708-294-30 bottles of 30 tablets with child-resistant closure NDC 46708-294-31 bottles of 100 tablets with child-resistant closure NDC 46708-294-71 bottles of 500 NDC 46708-294-91 bottles of 1000 NDC 46708-294-10 Unit dose tablets of 100 (10 x 10) Storage Store at 25°C (77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Dispense in a USP tight, light-resistant container. Call your doctor for medical advice about side effects.
You may report side effects to Alembic Pharmaceuticals Limited at 1-866-210-9797 or FDA at 1-800-FDA-1088. Alembic Pharmaceuticals Limited Manufactured in India Revised: 10/2024
📋 Description ▾
DESCRIPTION The active ingredient in famotidine tablets, USP is a histamine H 2 -receptor antagonist. Famotidine is N '-(aminosulfonyl)-3-[[[2-[(diaminomethylene)amino]-4-thiazolyl]methyl] thio]propanimidamide. The empirical formula of famotidine is C 8 H 15 N 7 O 2 S 3 and its molecular weight is 337.43.
Its structural formula is: Famotidine is a white to pale yellow crystalline compound that is freely soluble in glacial acetic acid, slightly soluble in methanol, very slightly soluble in water, and practically insoluble in ethanol. Each tablet for oral administration contains either 20 mg or 40 mg of famotidine and the following inactive ingredients: colloidal silicon dioxide, yellow iron oxide and red iron oxide, Lecithin, macrogel/PEG 3350, magnesium stearate, microcrystalline cellulose, polyvinyl alcohol, pregelatinized starch, talc and titanium dioxide.
Structure