Drug interactions
Alprazolam + Rifapentine
Severity: Moderate
Alprazolam and Rifapentine: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Rifapentine induces CYP3A4 and can substantially lower alprazolam concentrations, leading to loss of anxiolytic or anti-panic effect and possible withdrawal symptoms. The induction can persist for some time after rifapentine is stopped.
What this interaction means in plain words
Alprazolam and Rifapentine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Alprazolam belongs to Central Nervous System; Rifapentine belongs to Anti Bacterial.
Why it happens
Induction of CYP3A4 increases alprazolam clearance.
What to do
Monitor clinical response and increase the alprazolam dose if needed, or consider a benzodiazepine less dependent on CYP3A4 such as lorazepam. Reduce the dose again after the inducer is discontinued.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Alprazolam
- Alprazolam + Calcium / magnesium / potassium / sodium oxybates Contraindicated
- Alprazolam + Itraconazole Contraindicated
- Alprazolam + Ketoconazole Contraindicated
- Alprazolam + Levoketoconazole Contraindicated
- Alprazolam + Sodium oxybate Contraindicated
- Alfentanil + Alprazolam Major
Frequently asked questions
Can I take Alprazolam with Rifapentine?
MediHelp rates the interaction as moderate. Alprazolam and Rifapentine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Rifapentine induces CYP3A4 and can substantially lower alprazolam concentrations, leading to loss of anxiolytic or anti-panic effect and possible withdrawal symptoms. The induction can persist for some time after rifapentine is stopped.
How serious is the interaction between Alprazolam and Rifapentine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response and increase the alprazolam dose if needed, or consider a benzodiazepine less dependent on CYP3A4 such as lorazepam. Reduce the dose again after the inducer is discontinued.
What other medicines interact with Alprazolam?
MediHelp also lists interactions of Alprazolam with, for example, Calcium / magnesium / potassium / sodium oxybates, Itraconazole, Ketoconazole. The full list is on the Alprazolam page.
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