A patient expresses concerns about motion sickness. Which medication is most effective in preventing motion sickness?
a. Serotonin antagonists
b. Phenothiazines
c. Corticosteroids
d. Anticholinergics
ANS: D
Anticholinergic agents are used to treat motion sickness by counterbalancing the excessive amounts of acetylcholine present. Serotonin antagonists are used in the treatment of emesis associated with cancer chemotherapy, radiation therapy, and postoperative nausea and vomiting. Phenothiazines are used in the treatment of mild to moderate nausea and vomiting associated with anesthesia and surgery, radiation therapy, and cancer chemotherapy. Corticosteroids are used in the treatment of nausea and vomiting related to pregnancy, postsurgical state, chemotherapy, radiation, and bowel obstruction.
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