Drug interactions
Bexarotene + Lorlatinib
Severity: Major
Bexarotene and Lorlatinib: major 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
Bexarotene is a moderate CYP3A4 inducer and may lower lorlatinib levels, reducing efficacy. Lorlatinib has also been associated with hepatotoxicity when given with inducers.
What this interaction means in plain words
Bexarotene and Lorlatinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Bexarotene belongs to Oncology; Lorlatinib belongs to Oncology.
Why it happens
Bexarotene induces CYP3A4, increasing lorlatinib metabolism.
What to do
Avoid the combination if possible. If it is used, monitor liver enzymes and bilirubin and watch for loss of response.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Lorlatinib
- Amobarbital + Lorlatinib Contraindicated
- Apalutamide + Lorlatinib Contraindicated
- Butabarbital + Lorlatinib Contraindicated
- Carbamazepine + Lorlatinib Contraindicated
- Enzalutamide + Lorlatinib Contraindicated
- Fosphenytoin + Lorlatinib Contraindicated
Other interactions of Bexarotene
- Bexarotene + Gemfibrozil Major
- Alogliptin-pioglitazone + Bexarotene Moderate
- Amobarbital + Bexarotene Moderate
- Aprepitant + Bexarotene Moderate
- Axitinib + Bexarotene Moderate
- Bexarotene + Bosentan Moderate
Frequently asked questions
Can I take Bexarotene with Lorlatinib?
MediHelp rates the interaction as major. Bexarotene and Lorlatinib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Bexarotene is a moderate CYP3A4 inducer and may lower lorlatinib levels, reducing efficacy. Lorlatinib has also been associated with hepatotoxicity when given with inducers.
How serious is the interaction between Bexarotene and Lorlatinib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible. If it is used, monitor liver enzymes and bilirubin and watch for loss of response.
What other medicines interact with Lorlatinib?
MediHelp also lists interactions of Lorlatinib with, for example, Amobarbital, Apalutamide, Butabarbital. The full list is on the Lorlatinib page.
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