Bromazolam: Difference between revisions

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Latest revision as of 00:35, 22 May 2026

Designer benzodiazepine, Triazolobenzodiazepine, Sedative-Hypnotic, Research material

Bromazolam

(none, never marketed)

Bromazolam is a triazolobenzodiazepine first synthesized by Upjohn in 1976 and never developed clinically. It emerged on the research-chemical market around 2016 and, beginning around 2021–2022, became one of the most commonly encountered designer benzodiazepines in North America, notably as an adulterant in the illicit opioid supply alongside fentanyl and, often, xylazine. Pharmacologically and structurally it is the bromine analog of alprazolam, with comparable potency and a similar (or somewhat longer) duration of action.

Experience

👥 No personal reports yet

⚕ No clinical reports yet

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Problems

None approved. Has no recognized medical role.

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Titration strategies

No therapeutic dosing. Harm-reduction note: because of inconsistent tablet purity and frequent fentanyl co-contamination, any illicit "benzo" tablet should be assumed to potentially contain bromazolam, fentanyl, or both.

+ Add a titration strategy

Effects

Sedation, anxiolysis, anterograde amnesia, ataxia, slurred speech, disinhibition, prolonged blackouts. At high dose or in combination: severe sedation, respiratory depression, coma. Paradoxical agitation/aggression occasionally reported. Withdrawal mirrors other high-potency benzos: anxiety, insomnia, autonomic hyperactivity, seizures, delirium, and can be life-threatening, often more protracted than alprazolam withdrawal owing to the longer half-life.

+ Add an effect

Pharmacokinetics

Lipophilic; orally bioavailable; hepatic metabolism (CYP3A4 predominantly) with hydroxylated metabolites. Half-life appears longer than alprazolam, with case reports of detection in blood/urine for days after a single exposure. Standard benzodiazepine immunoassay screens frequently miss bromazolam, confirmatory LC-MS/MS is required for reliable detection.

Pharmacodynamics

Non-selective positive allosteric modulator at the benzodiazepine site of GABA_A receptors containing α1, α2, α3, or α5 subunits with a γ subunit. Like alprazolam, clinically displays anxiolytic, hypnotic, anticonvulsant, amnestic, and muscle-relaxant effects with significant abuse liability. Respiratory depression at high doses is modest in isolation but markedly synergized by opioids, alcohol, and other CNS depressants, the dominant mechanism of bromazolam-associated mortality.

Interactions

No interactions reported yet.

Opioids (fentanyl, heroin, methadone, buprenorphine): profound additive respiratory depression, primary mechanism of bromazolam-associated overdose death.
Alcohol, GHB, barbiturates, gabapentinoids: additive CNS/respiratory depression.
Xylazine: frequently co-encountered in illicit opioid supply ("tranq dope"); compounds sedation and complicates resuscitation (xylazine is not reversed by naloxone).
CYP3A4 inhibitors (azoles, macrolides, ritonavir, grapefruit): prolong/intensify effect.
CYP3A4 inducers (rifampin, carbamazepine, phenytoin, St John's wort): may reduce levels.
Flumazenil reverses GABA_A effects but is rarely used in mixed-overdose / chronic-benzo contexts due to seizure risk.
Pregnancy and lactation

Avoid in pregnancy and lactation. Class data extrapolated from clinical benzodiazepines; designer status means no formal safety data.

Monitoring

In suspected overdose: airway, respiratory rate, oxygen saturation, mental status. Standard urine benzodiazepine immunoassay is insensitive to bromazolam, request specific LC-MS/MS confirmation. ECG and electrolytes if mixed overdose suspected.

Patient counseling

Patients should be counseled that illicit "Xanax bars" or designer benzodiazepine tablets are frequently bromazolam and/or fentanyl. Never combine with opioids or alcohol. Withdrawal requires medically supervised taper, do not stop abruptly after sustained use. Carry naloxone if any opioid co-use is plausible (naloxone does not reverse bromazolam itself but reverses concurrent opioid depression).

Relevant anecdote

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Relevant Literature

No literature entries yet.

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References

DEA Diversion. Bromazolam. Drug & Chemical Evaluation Section, 2023.
Papsun DM, et al. Forensic toxicology of bromazolam. J Anal Toxicol 2022.
CFSRE / NPS Discovery. Bromazolam emergence reports, 2021–2024.
Health Canada / CCENDU bulletins on designer benzodiazepines in the unregulated med supply.

Structure of Bromazolam

Summary

Classes

Designer benzodiazepine, Triazolobenzodiazepine, Sedative-Hypnotic, Research material

Common uses

No approved medical problem. Encountered as a designer/research benzodiazepine and, increasingly, as an adulterant in illicit opioid supplies.

Pharmacy

Starting dose

No medical dose. Active recreational doses reported in the 0.5–1.5 mg range (similar potency to alprazolam).

Preparations

Illicit tablets ("bars"), powders, blotter, occasionally solutions. No pharmaceutical product exists.

US FDA Max

N/A (never approved)

Pharmacology

Routes

Oral, sublingual, intranasal; rectal and IV reported.

Onset

~20–40 min PO; faster sublingual/intranasal.

Duration

6–10 h subjective; full pharmacologic effect considerably longer.

Half-life

Estimated ~12–17 h (some sources cite up to ~21 h); active metabolites prolong effect.

Bioavailability

Not formally characterized in humans.

Pregnancy

Avoid. Benzodiazepines are associated with neonatal sedation, floppy-infant syndrome, and withdrawal; teratogenic signal weak but non-zero. Designer benzo with no safety data, assume worst-case.

Legal status

First synthesized by Upjohn in 1976; never marketed. Schedule I in several U.S. states (e.g., Virginia, Florida, Mississippi, Alabama); federally unscheduled in the U.S. as of mid-2020s but DEA has listed it as a med of concern. Class C in the UK (generic benzodiazepine controls). Controlled in Sweden, Germany (NpSG), Switzerland, and Canada.

Purported mechanism

Positive allosteric modulator of the GABA_A receptor at the benzodiazepine binding site; increases frequency of Cl⁻ channel opening, producing anxiolytic, sedative, hypnotic, anticonvulsant, and skeletal-muscle relaxant effects.

@@ Line 1: / Line 1: @@
 {{MedTemplate
 | generic            = Bromazolam
-| brand              = (none — never marketed)
+| brand              = (none, never marketed)
 | structure          = Triazolobenzodiazepine; 8-bromo analog of alprazolam (bromine in place of the chloro substituent at the 8-position).
 | classes            = Designer benzodiazepine, Triazolobenzodiazepine, Sedative-Hypnotic, Research material
 | mechanism          = Positive allosteric modulator of the GABA<sub>A</sub> receptor at the benzodiazepine binding site; increases frequency of Cl<sup>−</sup> channel opening, producing anxiolytic, sedative, hypnotic, anticonvulsant, and skeletal-muscle relaxant effects.
-| uses               = No approved medical indication. Encountered as a designer/research benzodiazepine and, increasingly, as an adulterant in illicit opioid supplies.
+| uses               = No approved medical problem. Encountered as a designer/research benzodiazepine and, increasingly, as an adulterant in illicit opioid supplies.
 | starting_dose      = No medical dose. Active recreational doses reported in the 0.5–1.5 mg range (similar potency to alprazolam).
 | preparations       = Illicit tablets ("bars"), powders, blotter, occasionally solutions. No pharmaceutical product exists.
@@ Line 14: / Line 14: @@
 | halflife           = Estimated ~12–17 h (some sources cite up to ~21 h); active metabolites prolong effect.
 | bioavailability    = Not formally characterized in humans.
-| pregnancy          = Avoid. Benzodiazepines are associated with neonatal sedation, floppy-infant syndrome, and withdrawal; teratogenic signal weak but non-zero. Designer benzo with no safety data — assume worst-case.
+| pregnancy          = Avoid. Benzodiazepines are associated with neonatal sedation, floppy-infant syndrome, and withdrawal; teratogenic signal weak but non-zero. Designer benzo with no safety data, assume worst-case.
-| legal              = First synthesized by Upjohn in 1976; never marketed. Schedule I in several U.S. states (e.g., Virginia, Florida, Mississippi, Alabama); federally unscheduled in the U.S. as of mid-2020s but DEA has listed it as a medicine of concern. Class C in the UK (generic benzodiazepine controls). Controlled in Sweden, Germany (NpSG), Switzerland, and Canada.
+| legal              = First synthesized by Upjohn in 1976; never marketed. Schedule I in several U.S. states (e.g., Virginia, Florida, Mississippi, Alabama); federally unscheduled in the U.S. as of mid-2020s but DEA has listed it as a med of concern. Class C in the UK (generic benzodiazepine controls). Controlled in Sweden, Germany (NpSG), Switzerland, and Canada.
-| intro              = '''Bromazolam''' is a triazolobenzodiazepine first synthesized by Upjohn in 1976 and never developed clinically. It emerged on the research-chemical market around 2016 and, beginning around 2021–2022, became one of the most commonly encountered designer benzodiazepines in North America — notably as an adulterant in the illicit opioid supply alongside fentanyl and, often, xylazine. Pharmacologically and structurally it is the bromine analog of alprazolam, with comparable potency and a similar (or somewhat longer) duration of action.
+| intro              = '''Bromazolam''' is a triazolobenzodiazepine first synthesized by Upjohn in 1976 and never developed clinically. It emerged on the research-chemical market around 2016 and, beginning around 2021–2022, became one of the most commonly encountered designer benzodiazepines in North America, notably as an adulterant in the illicit opioid supply alongside fentanyl and, often, xylazine. Pharmacologically and structurally it is the bromine analog of alprazolam, with comparable potency and a similar (or somewhat longer) duration of action.
-| pharmacokinetics   = Lipophilic; orally bioavailable; hepatic metabolism (CYP3A4 predominantly) with hydroxylated metabolites. Half-life appears longer than alprazolam, with case reports of detection in blood/urine for days after a single exposure. Standard benzodiazepine immunoassay screens frequently '''miss''' bromazolam — confirmatory LC-MS/MS is required for reliable detection.
+| pharmacokinetics   = Lipophilic; orally bioavailable; hepatic metabolism (CYP3A4 predominantly) with hydroxylated metabolites. Half-life appears longer than alprazolam, with case reports of detection in blood/urine for days after a single exposure. Standard benzodiazepine immunoassay screens frequently '''miss''' bromazolam, confirmatory LC-MS/MS is required for reliable detection.
-| pharmacodynamics   = Non-selective positive allosteric modulator at the benzodiazepine site of GABA<sub>A</sub> receptors containing α1, α2, α3, or α5 subunits with a γ subunit. Like alprazolam, clinically displays anxiolytic, hypnotic, anticonvulsant, amnestic, and muscle-relaxant effects with significant abuse liability. Respiratory depression at high doses is modest in isolation but markedly synergized by opioids, alcohol, and other CNS depressants — the dominant mechanism of bromazolam-associated mortality.
+| pharmacodynamics   = Non-selective positive allosteric modulator at the benzodiazepine site of GABA<sub>A</sub> receptors containing α1, α2, α3, or α5 subunits with a γ subunit. Like alprazolam, clinically displays anxiolytic, hypnotic, anticonvulsant, amnestic, and muscle-relaxant effects with significant abuse liability. Respiratory depression at high doses is modest in isolation but markedly synergized by opioids, alcohol, and other CNS depressants, the dominant mechanism of bromazolam-associated mortality.
 | indications        = None approved. Has no recognized medical role.
 | dosing             = No therapeutic dosing. Harm-reduction note: because of inconsistent tablet purity and frequent fentanyl co-contamination, '''any''' illicit "benzo" tablet should be assumed to potentially contain bromazolam, fentanyl, or both.
-| effects            = Sedation, anxiolysis, anterograde amnesia, ataxia, slurred speech, disinhibition, prolonged blackouts. At high dose or in combination: severe sedation, respiratory depression, coma. Paradoxical agitation/aggression occasionally reported. Withdrawal mirrors other high-potency benzos: anxiety, insomnia, autonomic hyperactivity, seizures, delirium — and can be life-threatening, often more protracted than alprazolam withdrawal owing to the longer half-life.
+| effects            = Sedation, anxiolysis, anterograde amnesia, ataxia, slurred speech, disinhibition, prolonged blackouts. At high dose or in combination: severe sedation, respiratory depression, coma. Paradoxical agitation/aggression occasionally reported. Withdrawal mirrors other high-potency benzos: anxiety, insomnia, autonomic hyperactivity, seizures, delirium, and can be life-threatening, often more protracted than alprazolam withdrawal owing to the longer half-life.
 | interactions       = <pharmaInteractions/>
-* '''Opioids''' (fentanyl, heroin, methadone, buprenorphine): profound additive respiratory depression — primary mechanism of bromazolam-associated overdose death.
+* '''Opioids''' (fentanyl, heroin, methadone, buprenorphine): profound additive respiratory depression, primary mechanism of bromazolam-associated overdose death.
 * '''Alcohol, GHB, barbiturates, gabapentinoids''': additive CNS/respiratory depression.
 * '''Xylazine''': frequently co-encountered in illicit opioid supply ("tranq dope"); compounds sedation and complicates resuscitation (xylazine is not reversed by naloxone).
@@ Line 31: / Line 31: @@
 * '''Flumazenil''' reverses GABA<sub>A</sub> effects but is rarely used in mixed-overdose / chronic-benzo contexts due to seizure risk.
 | pregnancy_details  = Avoid in pregnancy and lactation. Class data extrapolated from clinical benzodiazepines; designer status means no formal safety data.
-| monitoring         = In suspected overdose: airway, respiratory rate, oxygen saturation, mental status. Standard urine benzodiazepine immunoassay is '''insensitive''' to bromazolam — request specific LC-MS/MS confirmation. ECG and electrolytes if mixed overdose suspected.
+| monitoring         = In suspected overdose: airway, respiratory rate, oxygen saturation, mental status. Standard urine benzodiazepine immunoassay is '''insensitive''' to bromazolam, request specific LC-MS/MS confirmation. ECG and electrolytes if mixed overdose suspected.
-| counseling         = Patients should be counseled that illicit "Xanax bars" or designer benzodiazepine tablets are frequently bromazolam and/or fentanyl. Never combine with opioids or alcohol. Withdrawal requires medically supervised taper — do not stop abruptly after sustained use. Carry naloxone if any opioid co-use is plausible (naloxone does '''not''' reverse bromazolam itself but reverses concurrent opioid depression).
+| counseling         = Patients should be counseled that illicit "Xanax bars" or designer benzodiazepine tablets are frequently bromazolam and/or fentanyl. Never combine with opioids or alcohol. Withdrawal requires medically supervised taper, do not stop abruptly after sustained use. Carry naloxone if any opioid co-use is plausible (naloxone does '''not''' reverse bromazolam itself but reverses concurrent opioid depression).
 | anecdotes          =
 | seealso            = [[Alprazolam]], [[Clonazolam]], [[Flualprazolam]], [[Etizolam]], [[Flumazenil]], [[Fentanyl]], [[Xylazine]], [[Naloxone]]
 | references         =
-* DEA Diversion. ''Bromazolam.'' Medicine & Chemical Evaluation Section, 2023.
+* DEA Diversion. ''Bromazolam.'' Drug & Chemical Evaluation Section, 2023.
 * Papsun DM, et al. Forensic toxicology of bromazolam. ''J Anal Toxicol'' 2022.
 * CFSRE / NPS Discovery. Bromazolam emergence reports, 2021–2024.
-* Health Canada / CCENDU bulletins on designer benzodiazepines in the unregulated medicine supply.
+* Health Canada / CCENDU bulletins on designer benzodiazepines in the unregulated med supply.
 }}
-[[Category:Research Materials]]
+[[Category:Research chemicals]]
 [[Category:Benzodiazepines]]
 [[Category:Triazolobenzodiazepines]]
 [[Category:GABAA Positive Allosteric Modulators (General)]]
 [[Category:GABAergics]]
-[[Category:Anxiolytics & Sedative-Hypnotics]]
+[[Category:Sedative-hypnotics]]