Simvastatin and Colchicine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 4, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Colchicine
Simvastatin
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.
Both colchicine (for gout or heart inflammation) and simvastatin (a cholesterol medicine) can, on their own, occasionally irritate your muscles. When you take them together, that muscle risk can add up. In rare cases this can lead to serious muscle breakdown called rhabdomyolysis.
The good news is that many people take these two together safely. The key is watching for warning signs. Tell your doctor right away if you notice new muscle pain, tenderness, weakness, or dark urine, especially in the first few months or after any dose change. Your care team can manage this by checking on you and adjusting things if needed. Don't stop either medicine on your own.
Effect: Additive myotoxicity, increasing risk of myopathy and rhabdomyolysis (case reports including a fatality). Both agents are independently associated with skeletal muscle toxicity; the precise mechanism of the interaction is unknown. Neither is a prodrug relevant here, so this is a pharmacodynamic (additive) rather than a simple PK effect.
Evidence: Probable; severity major. Notably, LoDoCo2 found no significant CK difference with statin plus colchicine 0.5 mg/day vs statin alone.
- Coadministration acceptable in appropriate patients with monitoring.
- Monitor for muscle pain/tenderness/weakness and CK, especially early and during titration of either drug.
- If myopathy suspected or CK markedly elevated, temporarily withhold or discontinue simvastatin or colchicine.
- Consider dose reduction in renal impairment.
What happens
An increased risk of myopathy or rhabdomyolysis
Interaction Deep Dive
Cases of myopathy and rhabdomyolysis have been documented when colchicine and simvastatin are taken together 1, and one such case was fatal 4. An analysis of the LoDoCo2 trial detected no meaningful difference in creatine kinase (CK) elevations between patients receiving statins combined with colchicine 0.5 mg/day and those on statins alone 5. Concurrent use may be reasonable in suitable patients, provided they are monitored for signs and symptoms of myopathy and rhabdomyolysis, especially throughout the first months of therapy and when either agent is being titrated. Simvastatin or colchicine should be temporarily held or stopped if myopathy or rhabdomyolysis is diagnosed or suspected, or if CK values rise markedly. A dose reduction may be warranted in patients with renal impairment 5.
Why it happens (mechanism)
Unknown
How to manage this interaction
This combination can often be used safely when your care team keeps an eye on you.
- Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise.
- Watch for muscle symptoms: pain, tenderness, weakness, or dark-colored urine, and report them promptly, especially in the first few months and after any dose change.
- Your team may check a creatine kinase (CK) blood test if symptoms appear.
- If problems show up, your prescriber may temporarily pause or stop one of the medicines, or adjust the dose (which may need to be individualized, particularly if your kidneys are impaired).
Ask your pharmacist to review your doses if you have kidney problems.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
2 reports — tap to read
a) In a distinct analysis from the LoDoCo2 trial, a numerically greater number of patients on combined simvastatin and colchicine 0.5 mg/day (n=162) compared with simvastatin by itself (n=153) showed creatine kinase (CK) values ranging from 191 to 285 units/L (below 1.5x ULN; 15.4% vs 9.8%); furthermore, a larger proportion of patients taking any statin concurrently (n=841) had elevated CK levels than those on placebo (n=832; 190 vs 146 patients). These differences did not attain statistical significance. None of the patients had renal impairment beyond mild severity (every patient had an estimated GFR of 50 mL/min/1.73 m(2) or higher). The authors advise considering pausing or stopping colchicine in patients with raised CK or signs of myotoxicity 5.
b) According to the American Heart Association, the combined use of simvastatin and colchicine may be considered in suitable patients. Reducing the dose of either simvastatin or colchicine may be considered when the two drugs are given together, owing to the possibility of competitive inhibition of CYP3A and competitive P-gp-mediated efflux; lowered colchicine doses should be considered in patients with renal impairment. Monitoring for muscle-related signs and symptoms of myopathy or rhabdomyolysis is advised 3.
Common questions
Can I take Simvastatin and Colchicine together?
Colchicine and simvastatin together raise the risk of muscle damage, so report any new muscle pain, weakness, or dark urine right away; many people use them together safely with monitoring, so don't stop either on your own. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Simvastatin 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 Simvastatin and Colchicine interaction managed?
This combination can often be used safely when your care team keeps an eye on you. Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Watch for muscle symptoms: pain, tenderness, weakness, or dark-colored urine, and report them promptly, especially in the first few months and after any dose change. Your team may check a creatine kinase (CK) blood test if symptoms… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Simvastatin 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 (5)
- Product Information: ZOCOR(R) oral tablets, simvastatin oral tablets. Organon & Co (per FDA), Jersey City, NJ, 2022. DailyMed
- Product Information: VYTORIN(R) oral tablets, ezetimibe simvastatin oral tablets. Organon LLC (per FDA), Jersey City, NJ, 2024. DailyMed
- Wiggins BS, Saseen JJ, Page RL, et al: Recommendations for management of clinically significant drug-drug interactions with statins and select agents used in patients with cardiovascular disease: a scientific statement from the American Heart Association. Circulation 2016; 134(21):e468-e495. PubMed
- Product Information: COLCRYS(R) oral tablets, colchicine oral tablets. AR Scientific, Inc. (per FDA), Philadelphia, PA, 2011. DailyMed
- van Broekhoven A, Eikelboom JW, Nidorf SM, et al: Elevations in creatine kinase are not related to the choice or dose of statins in patients taking colchicine 0.5 mg daily: insights from the LoDoCo2 trial. Clin Drug Investig 2023; 43(7):575-577. PubMed
Keep reading about Colchicine
Keep reading about Simvastatin
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