Vibegron 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
Vibegron
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.
Let's talk about taking Gemtesa (vibegron) together with colchicine. Your body normally pumps colchicine out using a transporter called P-gp. Vibegron can block that pump, so more colchicine can build up in your body. Because colchicine can become very toxic at higher levels (causing serious muscle, nerve, and blood problems), this combination is treated as one to avoid.
The good news is this is very manageable. Please don't stop either medication on your own. Just reach out to your pharmacist or doctor. They can review your kidney and liver health, adjust your colchicine dose if needed, or pick a safer option for you.
Effect: Vibegron may inhibit P-gp-mediated colchicine efflux, increasing colchicine exposure and risk of life-threatening toxicity. Colchicine is a P-gp (and CYP3A4) substrate; neither drug is a prodrug, so this is a straightforward exposure increase.
- Direction: Increased colchicine AUC/Cmax, increased toxicity risk.
- Evidence: Theoretical, extrapolated from documented P-gp inhibitor interactions.
- Severity: Labeled contraindicated with P-gp inhibitors, especially in renal or hepatic impairment.
- Management: Avoid coadministration; contraindicated in renal/hepatic impairment. If unavoidable in patients with normal organ function, reduce colchicine daily dose or dosing frequency and monitor closely for toxicity (GI, myopathy, neuropathy, cytopenias).
What happens
Increased colchicine exposure and an increased risk of colchicine toxicity
Interaction Deep Dive
Colchicine acts as a substrate for both CYP3A4 and P-gp. Cases of toxicity have been documented when it is given alongside clarithromycin, an agent that inhibits both CYP3A4 and P-gp. Similar toxicity has been seen when colchicine is combined with a CYP3A4 inhibitor and when it is combined with a P-gp inhibitor3. Using colchicine together with P-gp inhibitors is contraindicated, since life-threatening and fatal colchicine toxicity has been observed in such patients even at therapeutic colchicine doses 1. This combination is likewise contraindicated in individuals with renal or hepatic impairment, because life-threatening and fatal drug interactions have taken place. For patients whose renal and hepatic function is normal 2, when colchicine and a P-gp inhibitor must be given together, the colchicine dose should be adjusted, either by lowering the daily amount or by decreasing how often it is taken. Watch carefully for signs of colchicine toxicity 3.
Why it happens (mechanism)
Inhibition of P-gp-mediated colchicine efflux transport
How to manage this interaction
Here is how a care team typically handles this pairing:
- Avoidance first: This combination is generally not used together, and it is specifically avoided if you have any kidney or liver problems.
- If both are truly needed and your kidney and liver function are normal, your team may lower your colchicine daily dose or space out how often you take it.
- Closer monitoring for signs of colchicine toxicity is common.
Keep taking both medications as prescribed for now, and contact your pharmacist or prescriber promptly. Watch for and report diarrhea, vomiting, muscle pain or weakness, numbness, or unusual fatigue.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Vibegron and Colchicine together?
Vibegron can raise colchicine levels and this combination is considered contraindicated, so contact your pharmacist or doctor before using both; do not stop either drug on your own. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Vibegron and Colchicine 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 Vibegron and Colchicine interaction managed?
Here is how a care team typically handles this pairing: Avoidance first: This combination is generally not used together, and it is specifically avoided if you have any kidney or liver problems. If both are truly needed and your kidney and liver function are normal, your team may lower your colchicine daily dose or space out how often you take it. Closer monitoring for signs of colchicine toxicity… 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 Vibegron 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 (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 Vibegron
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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