Drug interactions
Isotretinoin + Lomitapide
Severity: Major
Isotretinoin and Lomitapide: 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
Both drugs can cause liver enzyme elevations and hepatotoxicity. Using them together may increase the risk or severity of liver injury, which is already a boxed concern with lomitapide.
What this interaction means in plain words
Isotretinoin and Lomitapide 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.
Isotretinoin belongs to Dermatology; Lomitapide belongs to Cardiovascular.
Why it happens
Additive hepatotoxicity from two agents that can independently injure the liver.
What to do
Avoid the combination where possible; if it is necessary, monitor ALT, AST and bilirubin more frequently than usual. Interrupt treatment if transaminases rise significantly.
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 Lomitapide
- Aprepitant + Lomitapide Contraindicated
- Clarithromycin + Lomitapide Contraindicated
- Crizotinib + Lomitapide Contraindicated
- Diltiazem + Lomitapide Contraindicated
- Efavirenz + Lomitapide Contraindicated
- Ensitrelvir + Lomitapide Contraindicated
Other interactions of Isotretinoin
- Demeclocycline + Isotretinoin Contraindicated
- Isotretinoin + Minocycline Contraindicated
- Isotretinoin + Oxytetracycline Contraindicated
- Isotretinoin + Palovarotene Contraindicated
- Aminolevulinic acid + Isotretinoin Major
- Doxycycline + Isotretinoin Major
Frequently asked questions
Can I take Isotretinoin with Lomitapide?
MediHelp rates the interaction as major. Isotretinoin and Lomitapide 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. Both drugs can cause liver enzyme elevations and hepatotoxicity. Using them together may increase the risk or severity of liver injury, which is already a boxed concern with lomitapide.
How serious is the interaction between Isotretinoin and Lomitapide?
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 where possible; if it is necessary, monitor ALT, AST and bilirubin more frequently than usual. Interrupt treatment if transaminases rise significantly.
What other medicines interact with Lomitapide?
MediHelp also lists interactions of Lomitapide with, for example, Aprepitant, Clarithromycin, Crizotinib. The full list is on the Lomitapide page.
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