Phenazepam is a benzodiazepine drug, first developed in the Soviet Union in 1975, and now produced in Russia and several other countries.
Meclonazepam ((S)-3-methylclonazepam) was discovered by a team at Hoffmann-La Roche in the 1970s and is a drug which is a benzodiazepine derivative similar in structure to clonazepam. It has sedative and anxiolytic actions like those of other benzodiazepines, and also has anti-parasitic effects against the parasitic worm Schistosoma mansoni.
Substituted cathinones, which include some stimulants and entactogens, are derivatives of cathinone. They feature a phenethylamine core with an alkyl group attached to the alpha carbon, and a ketone group attached to the beta carbon, along with additional substitutions. Cathinone occurs naturally in the plant khat whose leaves are chewed as a recreational drug.
N-Desalkylflurazepam is a benzodiazepine analog and an active metabolite of several other benzodiazepine drugs including flurazepam, flutoprazepam, fludiazepam, midazolam, flutazolam, quazepam, and ethyl loflazepate. It is long-acting, prone to accumulation, and binds unselectively to the various benzodiazepine receptor subtypes. It has been sold as a designer drug from 2016 onward.
Pyrazolam (SH-I-04) is a benzodiazepine derivative originally developed by a team led by Leo Sternbach at Hoffman-La Roche in the 1970s. It has since been "rediscovered" and sold as a designer drug since 2012.
Diclazepam (Ro5-3448), also known as chlorodiazepam and 2'-chloro-diazepam, is a benzodiazepine and functional analog of diazepam. It was first synthesized by Leo Sternbach and his team at Hoffman-La Roche in 1960. It is not currently approved for use as a medication, but rather sold as an unscheduled substance. Efficacy and safety have not been tested in humans.
3-Hydroxyphenazepam is a benzodiazepine with hypnotic, sedative, anxiolytic, and anticonvulsant properties. It is an active metabolite of phenazepam, as well as the active metabolite of the benzodiazepine prodrug cinazepam. Relative to phenazepam, 3-hydroxyphenazepam has diminished myorelaxant properties, but is about equivalent in most other regards. Like other benzodiazepines, 3-hydroxyphenazepam behaves as a positive allosteric modulator of the benzodiazepine site of the GABAA receptor with an EC50 value of 10.3 nM. It has been sold online as a designer drug.
Clonazolam is a drug of the triazolobenzodiazepine (TBZD) class, which are benzodiazepines (BZDs) fused with a triazole ring. Although little research has been done about its effects and metabolism, it is sold online as a designer drug.
Flubromazolam (JYI-73) is a triazolobenzodiazepine (TBZD), which are benzodiazepine (BZD) derivatives. Flubromazolam is reputed to be highly potent, and concerns have been raised that clonazolam and flubromazolam in particular may pose comparatively higher risks than other designer benzodiazepines, due to their ability to produce strong sedation and amnesia at oral doses of as little as 0.5 mg. Life-threatening adverse reactions have been observed at doses of only 3 mg of flubromazolam.
Deschloroetizolam is a thienotriazolodiazepine that is the dechlorinated analog of the closely related etizolam. The compound has been sold as a designer drug.
Nifoxipam is a benzodiazepine that is a minor metabolite of flunitrazepam and has been sold online as a designer drug.
Metizolam is a thienotriazolodiazepine that is the demethylated analogue of the closely related etizolam.
Desmethylflunitrazepam (also known as norflunitrazepam, Ro05-4435 and fonazepam) is a benzodiazepine that is a metabolite of flunitrazepam and has been sold online as a designer drug. It has an IC50 value of 1.499 nM for the GABAA receptor.
Nitrazolam is a triazolobenzodiazepine (TBZD) , which are benzodiazepine (BZD) derivatives, that has been sold online as a designer drug.
Cloniprazepam is a benzodiazepine derivative and a prodrug of clonazepam, 7-aminoclonazepam, and other metabolites.
CUMYL-PEGACLONE (SGT-151) is a gamma-carboline based synthetic cannabinoid that has been sold as a designer drug. The gamma-carboline core structure seen in CUMYL-PEGACLONE had not previously been encountered in a designer cannabinoid, though it is similar in structure to other gamma-carboline cannabinoids disclosed by Bristol-Myers Squibb in 2001.
Flualprazolam is a tranquilizer of the triazolobenzodiazepine (TBZD) class, which are benzodiazepines (BZDs) fused with a triazole ring. It was first synthesised in 1976, but was never marketed. It can be seen as the triazolo version of fludiazepam. It has subsequently been sold as a designer drug, first being definitively identified as such in Sweden in 2018. It can be described as the 2'-fluoro derivative of alprazolam or the fluoro instead of chloro analogue of triazolam, and has similar sedative and anxiolytic effects.
Nitemazepam is a benzodiazepine derivative which was first synthesised in the 1970s but was never marketed. It is the 7-nitro instead of 7-chloro analogue of temazepam, and also the 3-hydroxy derivative of nimetazepam, and an active metabolite. It has in more recent years been sold as a designer drug, first being definitively identified in Europe in 2017. It is metabolized to 7-aminonitemazepam, nimetazepam, 3-hydroxynitemazepam, temazepam, and nimetazepam glucuronide.
EG-018 is a carbazole-based synthetic cannabinoid that has been sold online as a designer drug. It acts as a partial agonist of the CB1 and CB2 receptor, with reasonably high binding affinity, but low efficacy in terms of inducing a signaling response.
