A member asked:

How soon does viagra (sildenafil) begin to work?

4 doctors weighed in across 2 answers
Dr. George Klauber answered

Specializes in Pediatric Urology

About 20 minutes.: Viagra (sildenafil) does not begin to work immediately, it has to be absorbed from your stomach, enter the blood stream and reach the penile blood vessels. This usually takes 20 - 30 minutes.

Answered 2/20/2013

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Viagra (sildenafil): Viagra (sildenafil) should be take on an empty stomache 1 hour prior to activity.

Answered 6/5/2018

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