Which neurotransmitter is the active ingredient in the drug Viagra, which is used to treat erectile disorders?
A)dopamine
B)serotonin
C)nitric oxide
D)norepinephrine

Question

Quizplus · Accepted Answer

The active ingredient in Viagra is sildenafil, which works by inhibiting the enzyme phosphodiesterase type 5 (PDE5) and increasing the levels of nitric oxide in the body. Nitric oxide is a neurotransmitter that plays a critical role in the relaxation of smooth muscle cells in the penis, leading to increased blood flow and an erection. Therefore, choice C, nitric oxide, is the correct answer.

Which Neurotransmitter Is the Active Ingredient in the Drug Viagra