and Montenegro). Other names such as Ravotril, Rivatril, Clonex, Paxam, or Kriadex are known throughout the rest of the world. Clonazepam has an unusually long elimination  half-life  of 18–50 hours, making it generally considered to be among the long-acting benzodiazepines. Clonazepam is a  chlorinated  derivative of nitrazepam and therefore a chloro-nitrobenzodiazepine. Clonazepam is