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A member asked:

What is the exact difference between famotidine 20mg and famotidine 40mg. does 40 last longer or just reduce more acid?

A doctor has provided 1 answer
Dr. Jerome Zacks answered

Specializes in Cardiology

Famotidine 40mg reduces stomach acid production to a greater extent than the 20mg dose, and the 40mg dose has a greater half-life (longer duration of effect) than the 20mg dose.

Answered 3/7/2021

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