WARNINGMIXING OR WITHDRAWAL CAN BE DANGEROUS
Ordinary doses in combination with other depressants can fatally stop breathing. After prolonged dependency, stopping suddenly can also cause seizures or delirium; seek medical help.
Clonazolam
Clonazolam is a highly potent depressant of the triazolobenzodiazepine class1, structurally related to both clonazepam and alprazolam1. First synthesized in 1971, it was never marketed pharmaceutically1 and has been available as a research chemical since the mid-2000s. It is considered to pose higher risks than many other designer benzodiazepines due to its exceptional potencycitation needed, with strong sedation and amnesia reported at very low doses. Blackouts and dependence are frequently reported concerns.
Dosage & Duration
Dosage
Doses are population estimates that vary widely between individuals.
Extremely potent; doses as small as 0.5 mg can produce strong sedation and amnesia, and doses above 0.5 mg can cause benzodiazepine overdose in some individuals. Onset may be delayed, with some users feeling little or nothing until 1-2 hours after administration; redosing is inadvisable at any point. Vendors often sell 500 µg products despite this exceeding a common dose.
Duration
Subjective Effects
Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.
Effects vary widely by individual, dose, and context.
Physical
The physical effects of clonazolam can be broken down into several components which progressively intensify proportional to dosage.
Cognitive
The cognitive effects of clonazolam can be broken down into several components which progressively intensify proportional to dosage. The general head space of clonazolam is described by many as one of intense sedation and decreased inhibition. It contains a large number of typical depressant cognitive effects. Paradoxical reactions to benzodiazepines such as increased seizures (in epileptics), aggression, increased anxiety, violent behavior, loss of impulse control, irritability and suicidal behavior sometimes occur (although they are rare in the general population, with an incidence rate below 1%). These paradoxical effects occur with greater frequency in recreational abusers, individuals with mental disorders, children, and patients on high-dosage regimes.
Pharmacology
Pharmacodynamics
Clonazolam acts as a positive allosteric modulator of GABA-A receptors at the benzodiazepine binding site, enhancing the activity of the inhibitory neurotransmitter GABA.citation needed It is notably potent, proving the most active compound in a series of triazolobenzodiazepines and sometimes effective at doses below 10 μg/kg in mice.1 The anticonvulsant properties of benzodiazepines may also involve binding to voltage-dependent sodium channels.2
Pharmacokinetics
Clonazolam undergoes extensive metabolism in humans.3 The primary metabolic routes include reduction of the nitro groupcitation needed to form 7-aminoclonazolam (the most abundant urinary metabolite)3, which is subsequently acetylatedcitation needed to 7-acetaminoclonazolam. Monohydroxylation also occurs4, most likely at the α- and 4-positions, yielding hydroxyclonazolamcitation needed. These metabolites are further conjugated with glucuronic acid.
Interactions
An unlisted combination is an unknown one, not a safe one. Check a dedicated combination chart before mixing.
Tolerance
Tolerance timelines are rules of thumb, not exact schedules, and vary widely between individuals and use patterns.
Benzodiazepines
Harm Potential
Addiction & Dependence
Psychological
Extremely HighClonazolam is considered extremely psychologically addictive with high abuse potential. Compulsive redosing is commonly reported, and the substance is noted for producing euphoria more frequently than many other benzodiazepines, which may increase its reinforcing properties. Rebound anxiety following use can facilitate cycles of dependence.
Physical
Extremely HighPhysical dependence can develop within days of regular use, and in some cases even after a single large dose. Withdrawal is potentially life-threatening and may include anxiety, insomnia, cognitive impairment, elevated blood pressure, increased heart rate, tremor, restlessness, and in severe cases psychosis and seizures. Abrupt discontinuation is strongly discouraged; gradual tapering under medical supervision is recommended.
Psychosis Risk
Psychosis is rare during intoxication but may occur during severe benzodiazepine withdrawal. Paradoxical reactions including aggression, violent behavior, and increased anxiety occur with an incidence below 1% in the general population but are more frequent in recreational abusers, individuals with mental disorders, and those on high-dose regimens.
Seizure Risk
Clonazolam possesses anticonvulsant properties during active use.1 However, abrupt discontinuation after regular use poses a significant seizure risk that can be life-threatening. Gradual tapering is essential for anyone who has developed physical dependence.
History & Culture
Clonazolam was first synthesized in 19711 by The Upjohn Company, the pharmaceutical corporation that would later bring alprazolam (Xanax) to market. In the original research, the compound was described as the most active substance in the series of…
Legality
International
Clonazolam is internationally placed in Schedule IV of the Convention on Psychotropic Substances of 1971. This international result does not itself establish each domestic implementation result above.
By Country
References
Citations
- World Health Organization Expert Committee on Drug Dependence. (2020). Critical Review Report: Clonazolam. World Health Organization. https://cdn.who.int/media/docs/default-source/controlled-substances/43rd-ecdd/final-clonazolam-a.pdf123456789101112
- McLean MJ, & Macdonald RL. (1988). Benzodiazepines, but not beta carbolines, limit high frequency repetitive firing of action potentials of spinal cord neurons in cell culture. The Journal of Pharmacology and Experimental Therapeutics, 244(2), 789-795. https://pubmed.ncbi.nlm.nih.gov/2450203/1
- Meyer MR, Bergstrand MP, Helander A, & Beck O. (2016). Identification of main human urinary metabolites of the designer nitrobenzodiazepines clonazolam, meclonazepam, and nifoxipam by nano-liquid chromatography-high-resolution mass spectrometry for drug testing purposes. Analytical and Bioanalytical Chemistry, 408(13), 3571-3591. https://doi.org/10.1007/s00216-016-9439-612
- Moosmann B, Huppertz LM, Hutter M, Buchwald A, & Auwärter V. (2015). Characterization of the four designer benzodiazepines clonazolam, deschloroetizolam, flubromazolam, and meclonazepam, and identification of their in vitro metabolites. Forensic Toxicology, 33(2), 388-395. https://doi.org/10.1007/s11419-015-0277-61
- Pietro Brunetti, Raffaele Giorgetti, Adriano Tagliabracci, Marilyn A. Huestis, & Francesco Paolo Busardò. (2021-06-11). Designer Benzodiazepines: A Review of Toxicology and Public Health Risks. Pharmaceuticals. https://doi.org/10.3390/ph140605601
- Office of Drug Control controlled-substances entry (Commonwealth import/export controls). odc.gov.au (n.d.). https://www.odc.gov.au/controlled-substances/list/clonazolam1
- Psychotropenverordnung (PV), Anlage 1, Z 2; §§ 1–2. ris.bka.gv.at (n.d.). https://ris.bka.gv.at/GeltendeFassung.wxe?Abfrage=Bundesnormen&Gesetzesnummer=100110541
- Psychotropenverordnung (PV), Anlage 1, Z 2; §§ 1–2. ris.bka.gv.at (n.d.). https://ris.bka.gv.at/NormDokument.wxe?Abfrage=Bundesnormen&Anlage=1&Artikel=&FassungVom=2026-02-03&Gesetzesnummer=10011054&Paragraf=&Uebergangsrecht=1
- Portaria SVS/MS nº 344/1998, Anexo I, Lista B1, as updated by RDC Anvisa nº 581/2021. gov.br (n.d.). https://www.gov.br/anvisa/pt-br/assuntos/medicamentos/controlados/lista-substancias1
- Portaria SVS/MS nº 344/1998, Anexo I, Lista B1, as updated by RDC Anvisa nº 581/2021. gov.br (n.d.). https://www.gov.br/anvisa/pt-br/assuntos/medicamentos/controlados/arquivos/copy_of_rdc581.pdf1
Article Status
Step 1 · Automated synthesisAn autonomous workflow built by Josie Kins compiled this article's foundation from information published across the web.
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24 January 2026
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more
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