Active Ingredient

Famotidine

Famotidine is a medication used to reduce stomach acid production. It is commonly used in situations where excess acid causes discomfort or damage.

People often take it for relief from conditions like heartburn and acid reflux.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Famotidine Brands

Pepcid

Strengths 20mg, 40mg

Famotidine is used to manage conditions related to excessive stomach acid.

Famotidine works by blocking histamine H2 receptors in the stomach lining. This action reduces the amount of acid the stomach produces.

By decreasing stomach acid, it helps alleviate symptoms and allows healing of the stomach lining.

Not everyone experiences side effects with Famotidine, and many side effects are mild and temporary.

Contact your doctor if you experience any serious or persistent symptoms.

Avoid consuming large amounts of alcohol while taking this medication.
Inform your doctor about any other medications you are taking to prevent interactions.
Do not use Famotidine if you have difficulty swallowing or persistent stomach pain.
Monitor your symptoms and report any unusual changes to your doctor.
Do not take this medication if you have a known allergy to it or similar medicines.

Always consult your doctor for advice tailored to your health condition.

How quickly does Famotidine work?

Famotidine typically begins to work within an hour, but it may take longer to feel the full effect.

How long does the effect of Famotidine last?

The effects of Famotidine usually last for several hours, providing relief from symptoms.

Is Famotidine safe for long-term use?

Famotidine can be used long-term under medical supervision, but regular check-ups are important.

Can I take Famotidine with other medications?

It’s important to inform your doctor of all medications you are taking to avoid potential interactions.

What should I do if I miss a dose?

If you miss a dose, take it as soon as you remember unless it’s almost time for your next dose. Do not double up doses.