A 48-Year-Old Man Comes to the Office Due to Concern

A 48-year-old man comes to the office due to concern that his skin is excessively dry, red, and cracked.  The patient explains that he washes his hands each time he touches something due to fear of contamination.  He spends 3-4 hours a day washing his hands and showers multiple times daily.  He was recently fired from his job after refusing to touch keyboards shared by coworkers and is worried that he will be unable to find employment.  On physical examination, the palms are erythematous with peeling skin.  Treatment of this patient's disorder is most likely to involve a medication affecting which of the following neurotransmitters?

A) Acetylcholine
B) Dopamine
C) Gamma-aminobutyric acid
D) Glutamate
E) Glycine
F) Histamine
G) Norepinephrine
H) Serotonin

Correct Answer:

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