Famotidine
Also sold as Famotidine, FAMOTIDINE, heartburn relief, Maximum Strength Acid Reducer
Medicine summary · from official FDA labels · Oct 19, 2026
What it’s used for
Famotidine tablets are indicated in adult and pediatric patients 40 kg and greater for the treatment of: • active duodenal ulcer (DU). • active gastric ulcer (GU).
How to take it
Indication Recommended Dosage ( 2. 1 ) Adult and Pediatric Patients 40 kg and greater Active DU 40 mg once daily; or 20 mg twice daily Active Gastric Ulcer 40 mg once daily GERD 20 mg twice daily Erosive Esophagitis 20 mg twice daily; or 40 mg twice daily Adults Pathological Hypersecretory Conditions 20 mg every 6 hours; adjust to patient needs; maximum 160 mg every 6 hours Risk Reduction of DU Recurrence 20 mg once daily • See full prescribing information for complete dosing information, including dosing in renal impairment, and recommended treatment duration.
Important warnings
5 WARNINGS AND PRECAUTIONS • Central Nervous System (CNS) Adverse Reactions: Elderly patients and patients with renal impairment at increased risk; reduce the dosage. ( 2.
Common side effects
The most common adverse reactions are: headache, dizziness, constipation, and diarrhea. ( 6.
Interactions
7 DRUG INTERACTIONS • Drugs Dependent on Gastric pH for Absorption: Systemic exposure of the concomitant drug may be significantly reduced leading to loss of efficacy.
If pregnant or breastfeeding
8.
Forms & strengths
26.6 MG / 800 MG Oral Tablet · 20 MG Disintegrating Oral Tablet · 40 MG Disintegrating Oral Tablet · 10 MG Oral Tablet · 10 MG/ML Injectable Solution · 4 MG/ML Injectable Solution · 40 MG Oral Tablet · 10 MG Chewable Tablet · 20 MG Oral Tablet · 8 MG/ML Oral Suspension · 20 MG Chewable Tablet
Questions to ask your doctor or pharmacist
- Is this the right medicine for my condition, and how long should I take it?
- What side effects should I watch for, and which need urgent attention?
- Does this interact with my other medicines, supplements, or alcohol?
- What should I do if I miss a dose or take too much?