Xanax (Alprazolam) Oral Tablets
Xanax is a prescription oral benzodiazepine containing alprazolam. It is used in adults for the short-term management of generalised anxiety disorder and panic disorder, with a recognised risk of dependence on prolonged use.
- Active ingredients
- Alprazolam
- Manufacturer
- Pfizer
- Dosage forms
- tablet, extended-release tablet
- Available dosages
- 0.25mg, 0.5mg, 1mg, 2mg
- Category
- Anti-anxiety Medications
What is it?
Xanax is the original brand name for alprazolam, marketed by Pfizer (Upjohn) and approved by the United States Food and Drug Administration in 1981. It is one of the most widely prescribed benzodiazepines in the world. The product is supplied as immediate-release scored tablets and as extended-release tablets, with several authorised generics on the market. Xanax is dispensed only on prescription because of its potential for misuse and dependence.
Active ingredients
Each tablet contains alprazolam as the sole active ingredient, supplied in immediate-release strengths of 0.25mg, 0.5mg, 1mg and 2mg, with corresponding extended-release strengths in different markets. Alprazolam is a triazolobenzodiazepine that potentiates the action of GABA at the GABA-A receptor.
Forms and dosages
Xanax is administered orally with or without food. According to the prescribing information, the usual starting dose for anxiety is 0.25 to 0.5mg three times daily, increased gradually as needed; for panic disorder, the initial 0.5mg three times daily can be titrated to higher doses under medical supervision. The extended-release formulation is taken once daily. Tablets should be swallowed whole; extended-release tablets must not be crushed or chewed.
Indications
Xanax is approved in adults for the short-term management of generalised anxiety disorder and panic disorder with or without agoraphobia. According to international guidelines, prescription should be limited to the lowest effective dose for the shortest period needed, typically two to four weeks for anxiety, with periodic reassessment. Xanax is not indicated for primary depression, primary insomnia or paediatric populations outside specific specialist settings.
How it works
Alprazolam binds to the benzodiazepine site of the GABA-A receptor and allosterically enhances GABA-mediated chloride conductance, hyperpolarising central nervous system neurons. The result is anxiolytic, sedative, hypnotic, anticonvulsant and muscle-relaxant effects. Onset of effect is typically within 30 to 60 minutes, peak at one to two hours, and a duration of effect related to the half-life of 6 to 27 hours. Steady state is reached within a few days of regular dosing.
Frequently asked questions
How quickly does Xanax work? ▾
Xanax typically begins to take effect within 30 to 60 minutes after oral administration of an immediate-release tablet, with peak plasma concentrations reached at around one to two hours. Subjective relief of anxiety symptoms may be perceived during this period. According to the prescribing information, the rapid onset contributes to its potential for misuse, particularly when used outside the prescribed schedule.
How long can Xanax be taken? ▾
Most clinical guidelines recommend short-term use of Xanax, typically two to four weeks, because of the risk of physical dependence, tolerance and withdrawal symptoms with chronic use. Longer durations are sometimes considered in selected cases under specialist supervision, with regular reassessment. According to the prescribing information, abrupt discontinuation should be avoided and a gradual tapering schedule is preferred.
Can Xanax be combined with alcohol? ▾
No. Combining Xanax with alcohol significantly increases the risk of severe sedation, respiratory depression, cognitive impairment and accidents. The combination with opioids carries similar risks and is identified as a major contributor to overdose mortality in several countries. According to the prescribing information, patients should avoid alcohol during treatment and disclose all concomitant medications to the prescriber.
What happens if Xanax is stopped abruptly? ▾
Abrupt discontinuation after sustained use can cause withdrawal symptoms including rebound anxiety, insomnia, tremor, palpitations, sweating and, rarely, seizures. The risk increases with higher doses, longer treatment duration and short-acting agents like alprazolam. According to the prescribing information, discontinuation should follow a gradual tapering schedule designed by the prescriber, often over weeks to months.
What are the main contraindications for Xanax? ▾
Xanax is contraindicated in known hypersensitivity to benzodiazepines, in narrow-angle glaucoma, in severe respiratory insufficiency and in concurrent use with strong CYP3A4 inhibitors such as itraconazole or ketoconazole. Caution is required in older adults, in hepatic impairment, in patients with substance use disorders and during pregnancy and breastfeeding. According to the prescribing information, the medical history must be reviewed by a clinician before any prescription.
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The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.