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. 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, 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
CYP3A4 inhibition
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Absorption interference
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.
Additive anticoagulation
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
Additive antiplatelet effect
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.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
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.
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.
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 methodologyWant this checked across everything you take?
This page checks the pairs you enter. The personalised Distil report goes further:
- the same graded, cited interaction check across your whole stack, not just the pairs you thought to type in
- where your current routine may be leaving you short of your goals
- the evidence-backed compounds worth adding, and the ones worth dropping
It's a paid report: £79, or £49 for the first 25 customers. The interactions check is one section of it, and you can read a real one in full before you buy.
See a real sample reportSomething 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.