Real Life Pharmacology - Pharmacology Education For Health Care Professionals

Solifenacin is a bladder antimuscarinic medication most commonly used for overactive bladder (OAB) with symptoms of urinary frequency, urgency, and urge incontinence. Like other agents in its class, understanding the pharmacology can help anticipate potential side effects, drug interactions, and downstream prescribing problems. Mechanism of Action Solifenacin selectively blocks muscarinic M3 receptors in the bladder detrusor muscle. Inhibiting these receptors reduces involuntary bladder contractions, increases bladder capacity, and delays the urge to void. While M3 selectivity may theoretically reduce side effects compared to nonselective antimuscarinics, in clinical practice, many anticholinergic effects still occur. Adverse Effects Because muscarinic receptors are present throughout the body, solifenacin can lead to a range of anticholinergic adverse effects: Dry mouth – among the most common, can be significant enough to cause dental issues with long-term use. Constipation – especially p