Assertion: promethazine's effect | /r/HasSubevent | tachycardia
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Source sentences:
text: First-generation oral AHs (FGAHs) additionally have potent antimuscarinic, anti-α-adrenergic, and antiserotonin effects leading to symptoms such as visual disturbances (mydriasis, photophobia, and diplopia), dry mouth, tachycardia, constipation, urinary retention, agitation, and confusion.