Anyway, I was told to take it every day, and I still do, but I've heard and read where others have been told to take it "as needed", so now I'm starting to worry that I shouldn't be taking it everyday. But I've Anyway, the drowsiness and side effects should go away after a few days, or maybe a week or two. Klonopin (Clonazepam) is okay for occasional or short-term use (up to 4 weeks) for anxiety, and to treat seizures. Less severe Drug class: Mental health; Rx status: Prescription only; Generic status: Lower-cost generic available (clonazepam) . It can take time for a drug to start working, or for some side effects to go away. Clonazepam, a benzodiazepine, has side effects that can be significantly dangerous when the drugs is misused. Learn the signs of abuse Patients who do not continue to take clonazepam may grow violently ill as they experience the onset of a debilitating benzodiazepine withdrawal syndrome. Shakiness, shortness of.