Clonazepam is used to treat seizures and panic disorder. Learn about side Call your doctor at once if you have: Initial dose: mg orally 2 times per day. Detailed dosage guidelines and administration information for Klonopin (clonazepam). Includes dose Klonopin is administered orally. To reduce the inconvenience of somnolence, administration of one dose at bedtime may be desirable. Clonazepam, sold under the brand name Klonopin among others, is a medication used to Dependence occurs in one-third of people who take clonazepam for longer than four weeks. .. – ng/mL were usually reached within 1–2 hours following a single 2 mg oral dose of micronized clonazepam in healthy adults.