MajorBenzodiazepines. Short-to-medium-acting anxiolytics×Antifungals, triazole derivatives
Updated · Methodology
Mechanism
Fluconazole at 200 mg/day or above blocks CYP3A4 – the main alprazolam metabolic route. Alprazolam plasma levels rise 2- to 3-fold, with stronger and longer effect.
Symptoms
Deep sedation, drowsiness, ataxia. Particularly dangerous in older patients – fall and fracture risk. Symptoms appear within 1–2 days.
Management
During fluconazole therapy, halve the alprazolam dose. Alternative antifungals: terbinafine or echinocandins. Alternative benzodiazepines without CYP3A4 dependence: lorazepam or oxazepam.
Check the full regimen, not just this pair
Opens the checker with these two drugs prefilled. Add the rest of the regimen and recompute additive risks.
Summary of a multi-drug list →
Medicine list: everything you take in one place →
Sources
- PubMed: Pharmacokinetic interactions of alprazolam with strong CYP3A4 inhibitors and inducers (2012)
- AEMPS: Ficha técnica: Alprazolam (nº registro 61880), sección 4.5 (2026)– AEMPS, CIMA, nº registro 61880, revisión 09/2026, sección 4.5
- AEMPS: Ficha técnica: Fluconazol (nº registro 67929), sección 4.5 (2026)– AEMPS, CIMA, nº registro 67929, revisión 10/2026, sección 4.5