Which drug is listed as an anticholinergic medication in the guidelines?

Which drug is listed as an anticholinergic medication in the guidelines?

• A. Desipramine
• B. Sertraline
• C. Doxepin
• D. Paroxetine

Answer: (C)

Anticholinergic activity means a medication blocks muscarinic acetylcholine receptors, leading to effects like dry mouth, constipation, urinary retention, blurred vision, and possible cognitive slowing. Doxepin, a tricyclic antidepressant with a tertiary amine structure, has strong anticholinergic (antimuscarinic) effects, which is why it’s listed as an anticholinergic medication in guidelines. The other drugs shown—desipramine (a secondary-amine TCA with less anticholinergic activity) and sertraline and paroxetine (SSRIs)—have minimal muscarinic blockade, so they’re not categorized as anticholinergic in this context. This distinction helps clinicians weigh anticholinergic burden, especially in older patients or those at risk for EPS or cognitive impairment.

Anticholinergic activity means a medication blocks muscarinic acetylcholine receptors, leading to effects like dry mouth, constipation, urinary retention, blurred vision, and possible cognitive slowing. Doxepin, a tricyclic antidepressant with a tertiary amine structure, has strong anticholinergic (antimuscarinic) effects, which is why it’s listed as an anticholinergic medication in guidelines. The other drugs shown—desipramine (a secondary-amine TCA with less anticholinergic activity) and sertraline and paroxetine (SSRIs)—have minimal muscarinic blockade, so they’re not categorized as anticholinergic in this context. This distinction helps clinicians weigh anticholinergic burden, especially in older patients or those at risk for EPS or cognitive impairment.