Clonazepam

Clonazepam (5-(2-Chlorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one), a benzodiazepine, is an orally administered medication sold under the proprietary names Klonopin, Rivotril and Clonotril but also available under its generic name. It is prescribed for inter alia anxiety disorders, epilepsy, panic-attacks and seizures.

It is known to be addictive when taken for extended periods. The famous singer and CFS-sufferer, Stevie Nicks has admitted to having had such an addiction.