(1)What enzyme does Viagra inhibit?
Ans:Phosphodiesterase type 5
(2)What impotence pill differs from Viagra the most due to the time factor?
Ans:Cialis
(3)What is a generic name of Viagra?
Ans:Sildenafil
(4)Viagra was initially developed to treat
Ans:Impotence
(5)How does the blood flow to the penis change during an erection?
Ans:During an erection, the arteries bringing blood to the penis open wider, and the veins that take blood away tighten up.