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Trihexyphenidyl Action Pathway

Possible side effects of using Trihexyphenidyl may include dry mouth, constipation, nausea, and vomiting. Trihexyphenidyl is administered as an oral tablet. … Trihexyphenidyl is a non-selective muscarinic acetylcholine receptor antagonist but binds with higher affinity to the M1 subtype.