Famotidine 40mg
Generic For: Pepcid
Famotidine 40mg (brand name Pepcid) is a prescription-strength histamine-2 (H2) blocker that reduces the amount of acid your stomach makes. It is used to treat GERD, stomach and duodenal ulcers, and other conditions caused by excess stomach acid. After a licensed provider reviews your order, your medication ships from a licensed U.S. pharmacy.
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50-day supply · $0.25/tablet
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Buy Famotidine 40mg (Pepcid) Online
Prescription-strength H2 blocker for GERD, stomach ulcers, and acid reflux
Famotidine 40mg Quick Facts
| Drug class | Histamine-2 (H2) blocker |
|---|---|
| Treats | GERD, stomach ulcers, duodenal ulcers, erosive esophagitis |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth daily as needed for heartburn. |
| Prescription required | Yes — prescription only |
What Is Famotidine 40mg?
Famotidine is a histamine-2 (H2) receptor blocker that decreases acid production in the stomach. While lower strengths (10mg and 20mg) are available over the counter for heartburn, the 40mg tablet is prescription strength and requires a prescription in the U.S. Prescription famotidine is used to treat gastroesophageal reflux disease (GERD), ulcers of the stomach and small intestine, and conditions where the stomach produces too much acid. It is the generic version of Pepcid and is taken by mouth, typically once or twice daily as directed by your provider.
What Does Famotidine 40mg Treat?
Gastroesophageal reflux disease (GERD)
Duodenal ulcers (active treatment and maintenance)
Active gastric (stomach) ulcers
Erosive esophagitis due to GERD
Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
Heartburn and acid indigestion (lower OTC strengths)
Famotidine 40mg Dosage
Duodenal ulcer: 40 mg by mouth once daily at bedtime for 4–8 weeks
GERD: 20 mg by mouth twice daily for up to 6 weeks
Erosive esophagitis: 20–40 mg by mouth twice daily for up to 12 weeks
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Famotidine 40mg Side Effects
Common side effects
- Headache
- Dizziness
- Constipation
- Diarrhea
- Nausea
- Fatigue
- Dry mouth
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Confusion, agitation, or hallucinations (especially in older adults or kidney impairment)
- Irregular or rapid heartbeat
- Severe allergic reaction (rash, hives, swelling of face or throat, trouble breathing)
- Unusual bruising or bleeding
- Signs of liver problems (yellowing skin or eyes, dark urine)
- Seizures (rare, mainly with kidney impairment)
Warnings & Interactions
Do not use if allergic to famotidine or other H2 blockers (e.g., cimetidine, ranitidine)
Dose adjustment needed for moderate to severe kidney impairment
Symptom relief does not rule out stomach cancer; persistent symptoms need evaluation
CNS side effects (confusion, delirium) reported in elderly and renally impaired patients
May reduce absorption of drugs that need stomach acid (e.g., certain antifungals, some HIV medications)
Tell your provider if you are pregnant, breastfeeding, or have kidney or liver disease
Tell your prescriber about all medications, supplements, and health conditions before starting famotidine 40mg.
Sources & References
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