Alprazolam

Q: What is Alprazolam used for?

Alprazolam is evaluated for the following indications with varying evidence strength: Panic disorder (evidence tier B), Generalized anxiety disorder (evidence tier C), Insomnia (evidence tier F). See the full indication matrix with dosing and citations above on this page.

Q: What are the side effects of Alprazolam?

Common side effects of Alprazolam (≥ 1 in 100): Drowsiness, ataxia, Cognitive impairment, coordination disturbance, Headache, Dry mouth, Reduced libido. See the Safety section for uncommon and serious reactions.

Q: Is Alprazolam safe during pregnancy?

FDA category D. FDA category D. Use in the third trimester causes neonatal withdrawal and 'floppy infant' syndrome. Contraindicated.

Q: Is Alprazolam compatible with breastfeeding?

Passes into breast milk and can cause infant sedation. Not recommended during breastfeeding.

Q: Who should not take Alprazolam?

Alprazolam is contraindicated in: Hypersensitivity to benzodiazepines; Acute closed-angle glaucoma; Myasthenia gravis; Severe respiratory failure, sleep apnoea syndrome; Severe hepatic impairment. Full list in the Safety section.

Q: Does Alprazolam carry an FDA boxed warning?

FDA black-box warning (2020): combining benzodiazepines with opioids significantly increases the risk of profound sedation, respiratory depression, coma, and death.

Benzodiazepines. Short-to-medium-acting anxiolytics

ATC code: N05BA12 (Alprazolam)

Brand names

Xanax, Xanax XR

Mechanism of action

Allosteric modulator of the GABA-A receptor. Potentiates GABA action through the benzodiazepine site. Increases chloride channel opening frequency and enhances inhibitory neurotransmission. Rapid onset (30-60 minutes), half-life 11-13 hours. Metabolised via CYP3A4. Among benzodiazepines, alprazolam has one of the highest potentials for misuse and dependence.

Indications

Panic disorder

Second line

Alprazolam is FDA- and EMA-registered for panic disorder. Recommended as a second-line option after SSRIs and SNRIs. APA 2023, NICE CG113, and WFSBP list SSRIs (escitalopram, sertraline, paroxetine) as first-line due to a more favourable long-term profile: no dependence risk or withdrawal syndrome. Benzodiazepines are discussed as a 'bridge' during the first 4-6 weeks of treatment while SSRIs reach therapeutic effect, or when SSRIs are not tolerated.

Long-term use (> 4-6 weeks) is not recommended due to dependence risk. If continuation is required, alternatives are sought – another drug class or psychotherapy.

Generalized anxiety disorder

Not recommended

For GAD, international guidelines (APA 2023, NICE CG113) recommend SSRIs and SNRIs as first-line. Benzodiazepines are considered only briefly for severe symptoms that prevent waiting for SSRI onset. Long-term alprazolam use in GAD is associated with cognitive impairment in older adults, dependence, and a difficult withdrawal syndrome.

Insomnia

Not recommended

Alprazolam is not recommended for chronic insomnia. When pharmacotherapy is needed, AASM 2021 recommends melatonin agonists (ramelteon), orexin antagonists (suvorexant, lemborexant), and low-dose doxepin. Benzodiazepines are acceptable only short-term (< 2-4 weeks) and preferentially as longer-acting agents (temazepam), not alprazolam. 'For flights' or 'holiday' use is dangerous due to dependence risk.

Practical notes

dependence_risk

Alprazolam is among the most problematic benzodiazepines for dependence potential. Withdrawal after 2-4 weeks of regular use can include rebound anxiety, insomnia, tremor, sweating, and in severe cases seizures and delirium. Tapering must be gradual, with 10-25% dose reduction every 2-4 weeks. Abrupt discontinuation from high doses is life-threatening. 'Years-long' alprazolam prescriptions are a common real-practice problem that has to be unravelled on therapy review.

interactions

Metabolised via CYP3A4. Strong inhibitors (ketoconazole, itraconazole, clarithromycin, HIV protease inhibitors, grapefruit juice) increase alprazolam levels and sedation risk. Combination with alcohol, opioids, or gabapentinoids risks severe CNS and respiratory depression. In 2020 the FDA added a black-box warning about combining benzodiazepines with opioids.

Safety

Boxed warning

FDA black-box warning (2020): combining benzodiazepines with opioids significantly increases the risk of profound sedation, respiratory depression, coma, and death.

Contraindications

Hypersensitivity to benzodiazepines
Acute closed-angle glaucoma
Myasthenia gravis
Severe respiratory failure, sleep apnoea syndrome
Severe hepatic impairment
Pregnancy and breastfeeding
Age under 18 years

Serious adverse effects

Physical and psychological dependence
Withdrawal syndrome (anxiety, insomnia, seizures, delirium)
Respiratory depression with opioids or alcohol
Paradoxical reactions (agitation, aggression) in older adults and children
Increased risk of motor-vehicle accidents and falls in older adults

Common adverse effects

Drowsiness, ataxia
Cognitive impairment, coordination disturbance
Headache
Dry mouth
Reduced libido

PregnancyFDA D

FDA category D. Use in the third trimester causes neonatal withdrawal and 'floppy infant' syndrome. Contraindicated.

Breastfeeding

Passes into breast milk and can cause infant sedation. Not recommended during breastfeeding.

Frequently asked

What is Alprazolam used for?

Alprazolam is evaluated for the following indications with varying evidence strength: Panic disorder (evidence tier B), Generalized anxiety disorder (evidence tier C), Insomnia (evidence tier F). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Alprazolam?

Common side effects of Alprazolam (≥ 1 in 100): Drowsiness, ataxia, Cognitive impairment, coordination disturbance, Headache, Dry mouth, Reduced libido. See the Safety section for uncommon and serious reactions.

Is Alprazolam safe during pregnancy?

FDA category D. FDA category D. Use in the third trimester causes neonatal withdrawal and 'floppy infant' syndrome. Contraindicated.

Is Alprazolam compatible with breastfeeding?

Passes into breast milk and can cause infant sedation. Not recommended during breastfeeding.

Who should not take Alprazolam?

Alprazolam is contraindicated in: Hypersensitivity to benzodiazepines; Acute closed-angle glaucoma; Myasthenia gravis; Severe respiratory failure, sleep apnoea syndrome; Severe hepatic impairment. Full list in the Safety section.

Does Alprazolam carry an FDA boxed warning?

FDA black-box warning (2020): combining benzodiazepines with opioids significantly increases the risk of profound sedation, respiratory depression, coma, and death.