Does Lorlatinib Interact with Fluconazole?
Lorlatinib and Fluconazole have a major drug interaction according to U.S. FDA drug labeling data. ( 2.4 , 7.1 ) • Fluconazole : Avoid concomitant use; reduce LORBRENA dose if concomitant use cannot be avoided. Fluconazole Avoid concomitant use of LORBRENA with fluconazole. Concomitant use of LORBRENA with fluconazole may increase lorlatinib plasma concentrations [see Clinical Pharmacology (12.3) ] , which may increase the incidence and severity of adverse reactions of LORBRENA. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Major
- Lorlatinib Class
- Kinase Inhibitor
- Fluconazole Class
- Azole Antifungal
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
What To Tell Your Doctor or Pharmacist
If you are taking Lorlatinib and your doctor is considering prescribing Fluconazole (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider