MAJOR — Use With Caution
DANGEROUS — benzodiazepine levels dramatically reduced
Evidence level: STRONG
Rifampin makes Xanax much less effective — you may experience anxiety breakthrough or withdrawal.
Rifampin induces CYP3A4. Alprazolam is a CYP3A4 substrate. Rifampin can reduce alprazolam levels by 50-80%.
Do not abruptly start rifampin without discussing with prescriber. Benzodiazepine dose may need adjustment. Lorazepam (glucuronidated) is less affected.
Follow each medication's specific timing instructions. Rifampin — check if it requires an empty stomach or should be taken with food. Alprazolam follows its normal schedule. Complete the full antibiotic course as prescribed.
Benzodiazepine dependence, abrupt rifampin initiation
Anxiety breakthrough, insomnia, potential withdrawal symptoms
Discuss switching to lorazepam (not CYP-dependent) during rifampin therapy.
Combining sedatives increases overdose risk. Discuss with your doctor: magnesium glycinate, L-theanine, or passionflower may provide anxiety relief with fewer interaction risks. Never stop benzodiazepines abruptly — taper under medical supervision.
Rifampin makes Xanax much less effective — you may experience anxiety breakthrough or withdrawal.
Follow each medication's specific timing instructions. Rifampin — check if it requires an empty stomach or should be taken with food. Alprazolam follows its normal schedule. Complete the full antibiotic course as prescribed.
Anxiety breakthrough, insomnia, potential withdrawal symptoms
Combining sedatives increases overdose risk. Discuss with your doctor: magnesium glycinate, L-theanine, or passionflower may provide anxiety relief with fewer interaction risks. Never stop benzodiazepines abruptly — taper under medical supervision.
Discuss switching to lorazepam (not CYP-dependent) during rifampin therapy.
Or browse the full interaction database (121,000+ pairs).