Tolterodine is best described as which type of agent?

• A. Antimuscarinic used for urinary incontinence
• B. Antipsychotic
• C. Antidepressant
• D. Antihistamine

Answer: (A)

Tolterodine is an antimuscarinic agent used to treat urinary incontinence. It works by blocking muscarinic receptors in the bladder, especially the receptors that drive detrusor muscle contractions, which reduces overactivity and helps control urge incontinence. This mechanism is distinct from antipsychotics, antidepressants, or antihistamines, which have different primary uses and receptor targets. In older adults, tolterodine can add to anticholinergic burden and may cause dry mouth, constipation, or cognitive effects, which is a consideration in Beers Criteria discussions.