A member asked:

How long does these side effects last? the most common side effects of viagra (sildenafil) are headache, flushing of the face, and upset stomach.

A doctor has provided 1 answer
Dr. Francisco R. Rodriguez answered

Specializes in Urology

Viagra (sildenafil) : Viagra (sildenafil) stays in your system about 4 hours, so potentially that long.

Answered 12/11/2014

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Related Questions

A member asked:

What are common side effects of viagra (sildenafil)?

A doctor has provided 1 answer