How long will hair shedding continue after stopping a drug that induced telogen effluvium?

Drug induced shedding is complicated. First, it’s often not the drug that people think it is. Second, shedding does not always stop once the drug is stopped but of course sometimes it does. Some drugs cause shedding in a dose dependent manner - so higher doses leads to more shedding. Less than 1 % of users of clonazepam get hair loss from the drug.

Stopping a drug that induced Telogen Effluvium will take a full hair cycle to reverse, which would be 6-9 months