Medically reviewed by Mary Choy, PharmD Key Takeaways Klonopin usually works within 30 to 60 minutes after taking it by mouth.Klonopin injected intravenously reaches the brain in under a minute.Food ...

Clonazepam is a generic prescription drug used to manage certain types of panic disorder or seizures. The drug comes as a tablet that you swallow. It’s usually taken two or three times daily.