Clonazepam: Knowing All That You Should Before Taking The Medicine Clonazepam, sold under the brand name Klonopin, is used on patients suffering from seizures and attacks, to keep them calm and composed by providing relaxation to the brain and the body. Clonazepam is a very mild medication that has immensely helped people to overcome their situations when used as needed. Clonazepam is a prescription drug that is available in the form of oral tablets and orally disintegrating tablets. Clonazepam is a controlled substance that is available only through prescription. The medicine can be taken solely and also in combination with other therapies and medicine to treat seizure and panic attacks.