Which of the following is a common adverse effect of anticholinergic medications?

• A. Dry mouth
• B. Nausea
• C. Increased sweating
• D. Hypotension

Answer: (A)

Anticholinergic medications block acetylcholine at muscarinic receptors, which reduces parasympathetic secretions. Salivary glands are driven by this system, so when these receptors are blocked, saliva production drops and the mouth becomes dry. This dryness is a typical and expected adverse effect with anticholinergic drugs, and you’d manage it with sips of water, sugar-free gum, or saliva substitutes and good oral care. Other options don’t fit as neatly: nausea isn’t the hallmark effect of this action, increased sweating would oppose the anticholinergic effect, and while low blood pressure can occur with some meds, it’s not the characteristic feature linked to muscarinic blockade.