Colchicine and Telmisartan: 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
Telmisartan
Colchicine
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.
Here's what's going on. Colchicine is a medicine your body normally pushes back out using a kind of cellular "pump" called P-gp. Telmisartan may slow that pump down. If the pump slows, more colchicine can build up in your body, which raises the chance of colchicine side effects like nausea, vomiting, diarrhea, muscle weakness, or more serious problems.
I want to be honest that this concern is mostly theoretical for this specific pair, but because colchicine toxicity can be dangerous, it's taken seriously. Please don't stop or change either medicine on your own. Talk with your pharmacist or doctor, who can tailor your colchicine dose and keep an eye on you.
Mechanism: Colchicine is a CYP3A4 and P-gp substrate. Telmisartan may inhibit P-gp-mediated colchicine efflux, increasing colchicine exposure and toxicity risk. Neither drug is a prodrug; this raises the active drug's effect.
- Direction: increased colchicine AUC/plasma levels.
- Evidence: theoretical (extrapolated from documented P-gp inhibitor toxicity).
- Severity/onset: labeled contraindicated; onset unspecified.
- Management: Coadministration is contraindicated in renal or hepatic impairment. In patients with normal renal/hepatic function, if unavoidable, reduce colchicine daily dose or frequency and monitor closely for toxicity (GI symptoms, myopathy, neuropathy, cytopenias).
What happens
Increased colchicine exposure and an increased risk of colchicine toxicity
Interaction Deep Dive
Both CYP3A4 and P-gp act on colchicine as a substrate. Cases of toxicity have arisen when colchicine was given together with clarithromycin, which inhibits both CYP3A4 and P-gp. Similar toxicities have been documented when colchicine was combined with a CYP3A4 inhibitor and when it was combined with a P-gp inhibitor3. Giving colchicine alongside P-gp inhibitors is contraindicated, since life-threatening and fatal colchicine toxicity has occurred in such patients even when colchicine was administered at therapeutic doses 1. This combination is likewise contraindicated in individuals with renal or hepatic impairment, because life-threatening and fatal drug interactions have been observed. For patients whose renal and hepatic function is normal 2, when colchicine must be coadministered with a P-gp inhibitor, modify the colchicine dose by lowering either the daily amount or the frequency of dosing. Watch closely for signs of colchicine toxicity 3.
Why it happens (mechanism)
Inhibition of P-gp-mediated colchicine efflux transport
How to manage this interaction
The key message: this pairing is flagged as contraindicated because colchicine can build up to dangerous levels, so your care team decides whether it's safe for you.
- Higher risk: people with kidney or liver problems should generally avoid this combination.
- If both are needed and your kidney and liver function are normal, your team may lower the colchicine dose or space out how often you take it. Your colchicine dose may need to be adjusted and individualized by your care team.
- You should: keep taking both as prescribed for now, and promptly ask your pharmacist or doctor to review this combination.
- Watch for and report: nausea, vomiting, diarrhea, muscle pain or weakness, numbness, or unusual fatigue.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Colchicine and Telmisartan together?
Telmisartan may slow how your body clears colchicine, so colchicine can build up and become toxic; this combination is labeled contraindicated. Don't change anything yourself, and have your pharmacist or doctor review it right away. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Colchicine and Telmisartan interaction?
It is rated contraindicated. These should generally not be used together.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Colchicine and Telmisartan interaction managed?
The key message: this pairing is flagged as contraindicated because colchicine can build up to dangerous levels, so your care team decides whether it's safe for you. Higher risk: people with kidney or liver problems should generally avoid this combination. If both are needed and your kidney and liver function are normal, your team may lower the colchicine dose or space out how often you take it. Y… 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.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Colchicine or Telmisartan 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 (3)
- Product Information: LODOCO(R) oral tablets, colchicine oral tablets. AGEPHA Pharma USA, LLC (per FDA), Parsippany, NJ, 2023. DailyMed
- Product Information: COLCRYS oral tablets, colchicine oral tablets. Takeda Pharmaceuticals America Inc (per FDA), Deerfield, IL, 2020. DailyMed
- Product Information: GLOPERBA(R) oral solution, colchicine oral solution. Romeg Therapeutics LLC (per FDA), Woburn, MA, 2019. DailyMed
Keep reading about Telmisartan
Keep reading about Colchicine
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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