Product Information
Registration Status: ActiveCLONOTRIL 0.5 TABLET 0.5mg is approved to be sold in Singapore with effective from 1991-04-07. It is marketed by GOLDPLUS UNIVERSAL PTE LTD, with the registration number of SIN06410P.
This product contains Clonazepam 0.5mg in the form of TABLET. It is approved for ORAL use.
This product is manufactured by REMEDICA LTD in CYPRUS.
It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.
Description
An anticonvulsant used for several types of seizures, including myotonic or atonic seizures, photosensitive epilepsy, and absence seizures, although tolerance may develop. It is seldom effective in generalized tonic-clonic or partial seizures. The mechanism of action appears to involve the enhancement of gamma-aminobutyric acid receptor responses. [PubChem]
Indication
Clonazepam is used as an anticonvulsant in the treatment of the Lennox-Gastaut syndrome (petit mal variant), akinetic and myoclonic seizures. It can also be used for the treatment of panic disorders.
Mechanism of Action
Allosteric interactions between central benzodiazepine receptors and gamma-aminobutyric acid (GABA) receptors potentiate the effects of GABA. As GABA is an inhibitory neurotransmitter, this results in increased inhibition of the ascending reticular activating system. Benzodiazepines, in this way, block the cortical and limbic arousal that occurs following stimulation of the reticular pathways.
Pharmacokinetics
- Absorption
- Clonazepam is rapidly and completely absorbed after oral administration. The absolute bioavailability of clonazepam is about 90%. Cmax, oral administration = 1 -4 hours.
- Distribution
- Metabolism
- Hepatic (cytochrome P450, including CYP3A). Biotransformation occurs mainly by reduction of the 7-nitro group to the 4-amino derivative. This derivative can be acetylated, hydroxylated, and glucuronidated.
- Elimination
Toxicity
Somnolence, confusion, coma, and diminished reflexes. The most commonly reported adverse event when clonazepam is used for seizure disorders is CNS depression. LD50, oral, rats = >15000 mg/kg.
Active Ingredient/Synonyms
1,3-dihydro-7-Nitro-5-(2-chlorophenyl)-2H-1,4.benzodiazepin-2-one | 5-(2-Chloro-phenyl)-7-nitro-1,3-dihydro-benzo[e][1,4]diazepin-2-one | 5-(2-Chlorophenyl)-7-nitro-1H-benzo[e][1,4]diazepin-2(3H)-one | 5-(O-Chlorophenyl)-7-nitro-1,3-dihydro-2H-1,4-benzodiazepin-2-one | CLONAZEPAM | Clonazepamum | Clonazepam |
Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.