Which class of medication is used to treat stress incontinence by increasing sphincter tone?

Which class of medication is used to treat stress incontinence by increasing sphincter tone?

• A. Urge Incontinence
• B. Alpha Agonists
• C. Indwelling Catheters
• D. Topical Estrogen

Answer: (B)

Alpha-adrenergic agonists increase urethral sphincter tone by stimulating alpha-1 receptors in the urethral smooth muscle, which raises the closure pressure of the urethra and helps prevent leakage during activities that raise intraabdominal pressure. This direct effect on the sphincter makes it the best option for addressing stress incontinence. Urge incontinence involves involuntary detrusor contractions, not a weakness of the sphincter, so it’s treated with different drugs like antimuscarinics or beta-3 agonists. Indwelling catheters are a mechanical fix and don’t improve sphincter tone. Topical estrogen can improve tissue atrophy and mucosal health but does not primarily increase sphincter tone. If using alpha-agonists, be mindful of potential side effects like elevated blood pressure and monitor accordingly.

Alpha-adrenergic agonists increase urethral sphincter tone by stimulating alpha-1 receptors in the urethral smooth muscle, which raises the closure pressure of the urethra and helps prevent leakage during activities that raise intraabdominal pressure. This direct effect on the sphincter makes it the best option for addressing stress incontinence.

Urge incontinence involves involuntary detrusor contractions, not a weakness of the sphincter, so it’s treated with different drugs like antimuscarinics or beta-3 agonists. Indwelling catheters are a mechanical fix and don’t improve sphincter tone. Topical estrogen can improve tissue atrophy and mucosal health but does not primarily increase sphincter tone. If using alpha-agonists, be mindful of potential side effects like elevated blood pressure and monitor accordingly.