What is the main action of antiemetics?
A) Altering central nervous system (CNS) actions to decrease perception of nausea
B) Speeding up the gastrointestinal (GI) tract so the stomach empties rapidly
C) Depressing hyperactive vomiting reflex
D) Changing the perception of motion in motion sickness
C
Feedback:
Antiemetics act by depressing the hyperactive vomiting reflex, either locally or through alteration of CNS actions. Options A, B, and D are not the main action of antiemetics.
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