Hi... Clonazepam has half-life of around 30 to 40 hours. This means it takes this amount of time for half of a dose of the drug to leave your body.
Clonazepam starts to work quickly and lasts in your system for several hours. How long the drug lasts can depend on:
your age, other health conditions, such as
kidney or
liver problems, other medications you are taking etc
But in general, each dose works for about 6 to 8 hours. Hence it's advisable not to consume alcohol while on clonazepam. May be you can consider consulting a psychiatrist and get proper treatment for your anxiety disorder.