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Alprazolam is a short-acting benzodiazepine that enhances the inhibitory effects of gamma-aminobutyric acid (GABA) at the GABA-A receptor. Clinically, this results in anxiolytic, sedative, muscle-relaxant, and anticonvulsant effects.
After oral administration, alprazolam is rapidly absorbed, with onset of action typically within 30–60 minutes. It undergoes extensive hepatic metabolism primarily via CYP3A4 to inactive metabolites, and has an elimination half-life of approximately 11 hours, which may be prolonged in elderly patients or those with hepatic impairment.
Common adverse effects include sedation, dizziness, impaired coordination, and cognitive slowing. More serious risks include respiratory depression, especially when combined with opioids, alcohol, or other CNS depressants.
Clinically, alprazolam should be used at the lowest effective dose for the shortest possible duration. Abrupt discontinuation should be avoided; gradual tapering is essential to reduce withdrawal risk. It is a controlled substance that carries the risk of addiction and dependence.
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