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Solifenacin is a competitive antagonist of M1, M2, and M3 muscarinic acetylcholine receptors (Kis = 25, 125, and 10 nM, respectively, for the human receptors).1 It inhibits calcium mobilization induced by carbachol (carbamoylcholine; Item No. 14486) in isolated guinea pig detrusor muscle cells (Ki = 4 nM).2 Solifenacin inhibits carbachol-induced contraction of isolated guinea pig urinary bladder smooth muscle. In vivo, solifenacin (0.03-1 mg/kg) inhibits carbachol-induced increases in urinary bladder pressure in anesthetized rats. Formulations containing solifenacin have been used in the treatment of overactive bladder.
WARNING This product is not for human or veterinary use.
1. Muscarinic receptors in the bladder: From basic research to therapeutics. Br. J. Pharmacol. 147(2), S80-S87 (2006).
2. M3 receptor antagonism by the novel antimuscarinic agent solifenacin in the urinary bladder and salivary gland. Naunyn Schmiedebergs Arch. Pharmacol. 366(2), 97-103 (2002).