Alprazolam
Alprazolam is a fast-acting depressant of the triazolobenzodiazepine class.12 Developed by Jackson Hester Jr. at the Upjohn Company, it was patented in 1971 and approved for medical use in the United States in 1981. It is widely prescribed for the management of anxiety and panic disorders2 and remains one of the most commonly prescribed medications in the U.S. Regular or excessive use can lead to physical dependence and addiction.1
Contents
Dosage & Duration
Dosage
Duration
Subjective Effects
Effects vary widely by individual, dose, and context.
Physical
The physical effects of alprazolam can be broken down into several components which progressively intensify proportional to dosage.
Cognitive
The cognitive effects of alprazolam can be broken down into several components which progressively intensify proportional to dosage. The general head space of alprazolam is described by many as one of intense sedation, relaxation, anxiety suppression 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.
Reagent Testing
Loading reagent data
Pharmacology
Pharmacodynamics
Alprazolam acts as a positive allosteric modulator at GABA-A receptors, binding nonselectively to the benzodiazepine site on the receptor complex.?2 This enhances the effects of GABA, the brain's primary inhibitory neurotransmitter, by increasing chloride ion conductance through the receptor channel, hyperpolarizing neurons and reducing their excitability. The drug affects receptor complexes containing α1 subunits (associated with sedation and amnesia) and α2 subunits (associated with anxiolysis).2 Alprazolam also acts as an agonist at the translocator protein and suppresses hypothalamic-pituitary-adrenal axis activity.3 Compared to some other benzodiazepines, alprazolam administration increases extracellular dopamine concentrations in the striatum.4
Pharmacokinetics
Alprazolam is rapidly absorbed orally with high bioavailability2 and readily crosses the blood-brain barrier. It is primarily metabolized in the liver via CYP3A4,? with minor contributions from CYP3A5, CYP3A7, and CYP2C9. Hydroxylation produces at least 29 metabolites, primarily 4-hydroxyalprazolam and α-hydroxyalprazolam,? though these are present at low concentrations with reduced receptor affinity and contribute minimally to the drug's effects. The majority of the dose is eliminated in the urine, largely as unmetabolized alprazolam.?
Dangerous
Highest riskThese combinations are considered extremely harmful and should always be avoided. Reactions to these drugs taken in combination are highly unpredictable and have a potential to cause death.
Unsafe
AvoidThere is considerable risk of physical harm when taking these combinations, they should be avoided where possible.
Caution
Use cautionThese combinations are not usually physically harmful, but may produce undesirable effects, such as physical discomfort or overstimulation. Extreme use may cause physical health issues. Synergistic effects may be unpredictable. Care should be taken when choosing to use this combination.
Tolerance
Benzodiazepines (all members of the class)
Harm Potential
Addiction & Dependence
Psychological
HighAlprazolam is considered highly psychologically addictive with significant abuse potential.5 Its high binding affinity, high potency, and rapid onset increase abuse liability.5 Compulsive redosing is commonly reported among users seeking a 'high', which frequently leads to blackout states and impaired judgment.
Physical
Extremely HighPhysical dependence develops reliably with regular use, particularly at doses above 4 mg daily or with use exceeding six months.? Withdrawal is potentially life-threatening and can include tremors, seizures, marked delirium, and in rare cases coma or death.? Medical supervision and gradual tapering over weeks or months is essential; abrupt discontinuation is extremely dangerous.?
Toxicity
Misuse of alprazolam has been shown to cause cognitive impairment including memory deficits; occasional use at therapeutic doses does not appear to cause lasting neurological damage.5
Injection of oral alprazolam preparations has caused dangerous damage to blood vessels, embolization, and rhabdomyolysis; this risk is specific to injection misuse and does not apply to oral administration.
Respiratory depression can occur at high doses or in overdose, particularly when combined with other depressants; patients with pre-existing respiratory impairment are at increased risk.?
Psychosis Risk
Hallucinations are rare during alprazolam use. Paradoxical reactions including mania, agitation, and rage occur with an incidence below 1% in the general population but are more frequent in recreational abusers, individuals with mental disorders, children, and patients on high-dose regimens.?6 Delirium and hallucinations may also occur during withdrawal.5
Seizure Risk
Alprazolam itself has anticonvulsant properties during use. However, abrupt discontinuation after regular use carries significant seizure risk that can be life-threatening.?7 Paradoxical increased seizure activity has been reported in epileptics. Gradual dose tapering over weeks is essential to minimize withdrawal seizure risk.?
History & Culture
Discovery and Development
Alprazolam was first synthesized in 1971 by J.B. Hester at the Upjohn Company, a pharmaceutical manufacturer that would later become part of Pfizer.8 The compound was developed as a triazolobenzodiazepine, featuring a triazole ring fused to the core benzodiazepine…
Legality
International
UN Convention on Psychotropic Substances 1971: Schedule IV.
1961 Convention: not internationally scheduled.
1988 Convention: not internationally scheduled.
By Country
References
Source Pages
Citations
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Further Reading
- Citation 1
Automated synthesisInformation aggregated and synthesized using an autonomous workflow built by Josie Kins.
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