Flavoxate is an anticholinergic with antimuscarinic effects. Its muscle relaxant properties may be due to a direct action on the smooth muscle rather than by antagonizing muscarinic receptors.

GoldBamboo

... FLAVOXATE (Urispas®) helps relieve spasms in the urinary tract. Generic flavoxate tablets are available. ...
Drug Digest - more...

Flavoxate Systematic (IUPAC) name 2-(1-piperidyl)ethyl 3-methyl-4 ...
Wikipedia - [full article]

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