Trospium is best described as which type?

• A. Antimuscarinic for urinary incontinence
• B. Antipsychotic
• C. Antiparkinsonian
• D. Skeletal muscle relaxant

Answer: (A)

Trospium is best described as an antimuscarinic agent used to treat urinary incontinence. It works by blocking muscarinic receptors in the bladder, which reduces detrusor muscle contractions and helps control overactive bladder and urge incontinence. Its quaternary ammonium structure limits its ability to cross the blood–brain barrier, so it tends to have fewer central nervous system side effects than some other antimuscarinics. This peripheral-focused action is especially relevant in older adults, where minimizing CNS anticholinergic burden is desirable. It is not an antipsychotic, not an antiparkinsonian, and not a skeletal muscle relaxant.