Multiple Choice
Loperamide (brand name: Imodium) ,which is available on an over-the-counter basis,does not produce any psychoactive effects if/because __________.
A) it is used by heroin addicts
B) it is taken in moderation
C) it is a licit drug
D) it cannot cross the blood-brain barrier
Correct Answer:

Verified
Correct Answer:
Verified
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