This article is from the Impotence FAQ, by Sine Nomine llama@drizzle.com with numerous contributions by others.
Pfizer recommends that you take 50 mg of Viagra anywhere from 4 hour
to 30 minutes before an erection is desired, with one hour being the
suggested optimal time. Dose can be raised to 100 mg if 50 mg is not
effective. You do not have to take Viagra on an empty stomach. There
appears to be no interaction between Viagra and alcohol, either.
 
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