Lomitapide and Colchicine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Lomitapide
No brand names on recordColchicine
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Let's talk about taking lomitapide and colchicine together. Lomitapide can slow down the enzyme (called CYP3A4) that your body uses to break down colchicine. When that happens, colchicine can build up to higher levels than it should.
That matters because too much colchicine can cause serious problems like severe diarrhea, muscle weakness or pain, and effects on your blood cells. This concern is based mostly on how these drugs work, not on lots of real-world reports, but it's still taken seriously. The good news is your care team can manage this by adjusting your colchicine dose and watching you closely. Please don't change anything on your own, just check in with your pharmacist or doctor.
Effect: Lomitapide, a CYP3A4 inhibitor, may reduce CYP3A4-mediated metabolism of colchicine, increasing colchicine exposure (AUC/Cmax) and the risk of dose-dependent toxicity (GI, neuromuscular, myelosuppression).
- Direction: Increased colchicine effect/toxicity (colchicine is the affected substrate; not a prodrug).
- Onset: Unspecified.
- Evidence: Theoretical; magnitude not quantified.
- Severity: Major.
Management: Avoid concomitant use where possible. If necessary, reduce the colchicine daily dose or dosing frequency and monitor closely for toxicity. Exercise added caution in renal or hepatic impairment.
What happens
Increased colchicine exposure and an increased risk of colchicine-related toxicity
Interaction Deep Dive
Because of the risk of severe and potentially fatal toxicity, colchicine should not be taken together with CYP3A4 inhibitors. When combined administration of colchicine with a CYP3A4 inhibitor cannot be avoided, modify the colchicine dosing by lowering either the amount taken daily or how often it is given, while closely watching for signs of colchicine toxicity1.
Why it happens (mechanism)
Inhibition of CYP3A4-mediated metabolism of colchicine
How to manage this interaction
Here's how a care team usually handles this combination:
- Often they avoid it if there's a safer option, because of the risk of serious colchicine toxicity.
- If you truly need both, your colchicine dose may be lowered or given less often, individualized to you.
- They may monitor you more closely for signs of colchicine toxicity.
What to do: keep taking both exactly as prescribed for now, and don't stop or change doses on your own. Contact your pharmacist or doctor to review this combination, and report symptoms like severe diarrhea, vomiting, muscle pain or weakness, numbness, or unusual fatigue right away.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Lomitapide and Colchicine together?
Lomitapide can raise colchicine levels and the risk of serious toxicity, so this pairing is often avoided; if used together, your team will lower the colchicine dose and monitor you closely. Don't change anything yourself, ask your pharmacist or doctor. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Lomitapide and Colchicine interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Lomitapide and Colchicine interaction managed?
Here's how a care team usually handles this combination: Often they avoid it if there's a safer option, because of the risk of serious colchicine toxicity. If you truly need both, your colchicine dose may be lowered or given less often, individualized to you. They may monitor you more closely for signs of colchicine toxicity. What to do: keep taking both exactly as prescribed for now, and don't st… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Lomitapide or Colchicine need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (1)
- Product Information: MITIGARE(R) oral capsules, colchicine oral capsules. Hikma Specialty USA Inc (per FDA), Columbus, OH, 2024. DailyMed
Keep reading about Lomitapide
Keep reading about Colchicine
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