Telenzepine is a thienobenzodiazepine acting as selective M1 antimuscarinic.

[1] Telenzepine is atropisomeric, in other words the molecule has a stereogenic C–N-axis.

In neutral aqueous solution it displays a half-life for racemization of the order of 1000 years.

The activity is related to the (+)-isomer which is about 500-fold more active than the (–)-isomer at muscarinic receptors in the rat cerebral cortex.

[2] This drug article relating to the gastrointestinal system is a stub.