Physics · Gastrointestinal Pharmacology
A patient is prescribed promethazine for nausea and vomiting and asks how it works. What is the best explanation of its mechanism of action?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Inhibits M1 muscarinic receptors in the gastrointestinal tract
- 2Inhibits D2 dopamine receptors in the brain
- 3Blocks 5-HT3 serotonin receptors in the CNS
- 4Blocks H1 histamine receptors and possesses anticholinergic properties✓
Correct answer
Blocks H1 histamine receptors and possesses anticholinergic properties
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