Although vasodilating drugs such as papaverine and prostaglandin are effective in producing an erection for patients with erectile dysfunction, many patients discontinue use of the drugs because of
a. pain associated with drug administration.
b. the fact that these drugs eventually cure the disorder.
c. the expense of the drug.
d. the fact that the effectiveness of the drug decreases with continued use.
Question 2
Papaverine and prostaglandin, which are vasodilating drugs used in the treatment of erectile dysfunction, are delivered to the patient
a. in a capsule taken orally.
b. as a dietary supplement.
c. by injection directly into the penis.
d. via a skin patch.
First-pass effect: (a) drugs are absorbed; (b) drugs enter hepatic portal circulation and go directl
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