Clonazolam
Clonazolam (clonitrazolam) is a triazolo analogue of clonazepam and one of the most potent designer benzodiazepines known, with effects reported at doses as low as ~0.5 mg. Its extreme potency makes accurate dosing without laboratory equipment effectively impossible, and it is associated with prolonged sedation, dense amnesia and overdose.
01 Overview
Clonazolam combines the clonazepam nitro group with a triazole ring, producing a compound that is active in the sub-milligram range and often described as more potent than either alprazolam or clonazepam. There are no human clinical studies; the evidence base is anecdotal reports, harm-reduction observations and forensic casework.
The central practical danger is potency: the difference between an active dose and a strongly sedating one is a fraction of a milligram, far below what can be measured on typical scales. Users commonly prepare volumetric solutions to dose accurately. Overdose produces protracted sedation and blackout, and in combination with opioids or alcohol the additive respiratory depression can be fatal.
02 Mechanism
High-potency positive allosteric modulator at the GABA-A benzodiazepine site; the triazolo ring and nitro substitution confer very high affinity.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Threshold | 0.1–0.25 mg | Oral | Active in the microgram-to-sub-milligram range; volumetric dosing strongly advised. |
| Common | 0.25–0.5 mg | Oral | Around 0.5 mg is already a strong dose; a scale accurate to this range is impractical. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Heavy sedation and hypnosisStrong, long-lasting sedation even at very small doses. | Anecdotal | ||
| AnxiolysisAnxiety reduction typical of the class, quickly overtaken by sedation as dose rises. | Anecdotal | ||
| Disinhibition and euphoriaEuphoria and loss of inhibition contribute to compulsive redosing. | Anecdotal |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Dependence and severe withdrawalRapid dependence; long duration and high potency make withdrawal, including seizure risk, especially dangerous. Cross-tolerant with all benzodiazepines. | Severe | Universal with regular use | Observational | |
| Overdose from micro-dosing errorBecause active doses are a fraction of a milligram, small measurement errors cause large overdoses with prolonged unconsciousness. | Life-threatening | Common given extreme potency | Anecdotal | |
| Respiratory depression in combinationAdditive respiratory depression with opioids or alcohol is the usual cause of fatal outcomes. | Life-threatening | Common in polydrug use | Observational |