Curcumin and medications.
Curcumin is in the Distil supplement database, evidence Grade B. The page below lists every medication we have explicitly assessed it against.
Curcumin is the active pigment in turmeric, studied for inflammation and joint pain with Grade B evidence and weaker support elsewhere. The single most important fact is absorption: plain turmeric is absorbed at about 1%, so an enhanced form is not optional. Use a phytosome preparation such as Meriva or BCM-95, or a piperine-paired form. There is a clear safety rule on form choice. Anyone on prescription medication should take the phytosome form only, because piperine sharply increases drug absorption. The interaction list is the reason for that caution. Curcumin is a mild CYP3A4 inhibitor, so it can raise blood levels of transplant drugs like tacrolimus, ciclosporin, and sirolimus, and transplant patients should avoid it unless their team is monitoring. The same CYP3A4 mechanism means it should also be avoided by anyone on antiretroviral therapy for HIV, where altered drug levels can compromise treatment. It can also affect other CYP3A4 medicines including some statins, calcium channel blockers, and hormonal contraceptives. It has a mild blood-thinning effect at higher doses, which is also a reason to pause it a couple of weeks before any planned surgery, and it needs a two-hour gap from iron. Match the form to your medication status first.
Below are the 13 documented pairs we have explicitly assessed for Curcumin: 4 red and 9 amber. The pairs cluster around 4 mechanisms: CYP3A4 inhibition, Absorption interference, Additive anticoagulation, and Additive antiplatelet effect. Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not listed here is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by medication, and the missing-item form at the bottom of the page routes any uncatalogued medication into our next curation pass.
Documented interactions
Last reviewed 14 June 2026. Each interaction below lists the evidence its assessment drew on: some rest on studies of the exact pair, others on mechanism evidence, where a citation may support one part of the reasoning rather than the exact combination. The evidence line on each entry says which.
CYP3A4 inhibition
Red Does interact with Ciclosporin?
Curcumin can slow how the body clears ciclosporin, which may push ciclosporin blood levels higher than intended. We treat this as a do-not-combine pair outside direct transplant-team supervision.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Red Does interact with Everolimus?
Curcumin can slow how the body clears everolimus, which may push everolimus blood levels higher than intended. We treat this as a do-not-combine pair outside direct transplant-team supervision.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Red Does interact with Sirolimus?
Curcumin can slow how the body clears sirolimus, which may push sirolimus blood levels higher than intended. We treat this as a do-not-combine pair outside direct transplant-team supervision.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Red Does interact with Tacrolimus?
Curcumin can slow how the body clears tacrolimus, which may push tacrolimus blood levels higher than intended. We treat this as a do-not-combine pair outside direct transplant-team supervision.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Atorvastatin?
Curcumin may slow how the body clears atorvastatin via CYP3A4, which can raise atorvastatin levels and increase muscle and liver side-effect risk. We treat this as a watch-and-tell-your-GP pair rather than a hard avoid.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Simvastatin?
Curcumin may slow how the body clears simvastatin via CYP3A4. Simvastatin is more sensitive to CYP3A4 inhibition than atorvastatin, so the effect on muscle and liver side-effect risk may be larger. We treat this as a watch-and-tell-your-GP pair.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Absorption interference
Amber Does interact with Sulfasalazine?
Curcumin can raise the amount of sulfasalazine absorbed from the gut, which may increase sulfasalazine levels and the chance of its side effects. If you take sulfasalazine, mention any curcumin or turmeric supplement to your GP or rheumatology team rather than adding it silently.
Evidence: Supported by human study data.
Additive anticoagulation
Amber Does interact with Acenocoumarol?
Curcumin (from turmeric) can mildly reduce clotting, which may add to the blood-thinning effect of acenocoumarol. Cooking amounts of turmeric are not the concern; concentrated curcumin supplements are. If you take acenocoumarol, discuss curcumin with your anticoagulant clinic and watch for bruising or bleeding.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Apixaban?
Curcumin has a mild blood-thinning effect of its own, so combining it with apixaban may add slightly to the bleeding risk. There is no strong human evidence either way, so the sensible step is to tell your GP you take it and stop curcumin before any planned surgery or dental work.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Rivaroxaban?
Curcumin has a mild blood-thinning effect of its own, so combining it with rivaroxaban may add slightly to the bleeding risk. There is no strong human evidence either way, so the sensible step is to tell your GP you take it and stop curcumin before any planned surgery or dental work.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Warfarin sodium?
Curcumin may add to warfarin's blood-thinning effect. If you take warfarin, ask your GP before adding curcumin and monitor your INR closely if you do.
Evidence: Limited human data, based on case reports and a known mechanism.
Additive antiplatelet effect
Amber Does interact with Aspirin?
Curcumin has a mild blood-thinning effect of its own, so taking it alongside aspirin may add to the bleeding risk. The combination is not dangerous at typical doses, but it is worth stopping curcumin before any planned surgery or dental work and telling your GP you take it.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Amber Does interact with Clopidogrel?
Curcumin has a mild blood-thinning effect of its own, so taking it with clopidogrel may add to the bleeding risk. The combination is worth stopping before any planned surgery or dental work, and worth mentioning to your GP.
Evidence: Based on an established mechanism, with no direct study of this exact combination yet.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
What this list does not say. Pairs not flagged here are not implicitly safe. They are either not yet in our database, or fall outside our inclusion scope. Use the checker below to surface any medication, and submit a missing item if you take something we have not catalogued.
No affiliates. No commission. We earn nothing on what you buy.
How we grade severity, choose what's in scope, and what we exclude.
Every call on this page is reasoned. We publish the full rubric for severity tiers, the medication inclusion logic, the evidence grades we accept, and what we deliberately leave out. About three thousand words. Worth reading once if you use this tool more than occasionally.
Read the full methodologyA full supplement review, built around you, not a generic stack.
The free checker answers one interaction question at a time. A Distil report reviews the bigger picture: your goals, diet, medications, current supplements and any blood results you provide, then shows what appears worth keeping, changing, adding or leaving out.
- what your diet already covers, so you are not adding a capsule for something food is already handling
- which evidence-graded compounds are worth considering for your goals, and which were considered but left out
- what to keep, change or stop from what you already take, plus the order to introduce anything new
- how your medications and complete supplement stack fit together, with daily timing and a clear point for reassessment
The interaction check is one section of the full report. You also get the reasoning behind each recommendation and the evidence references used.
£49 introductory price for early customers. Standard price £79.
Something missing?
If a supplement or medication you take isn't in our autocomplete, tell us. We go through what people flag every week and add what's missing.