Supplements and Atorvastatin.
Atorvastatin, sold under the brand name Lipitor, is a statin: it lowers LDL cholesterol by inhibiting HMG-CoA reductase. Statins are the most-prescribed class in the UK.
Atorvastatin is the most prescribed medicine in England. Over 72 million dispensed items per year on NHSBSA records. It blocks HMG-CoA reductase, the enzyme that controls the speed of cholesterol synthesis in the liver, and most of the LDL drop happens at the lowest dose. The step from 20mg to 80mg is smaller than people assume. CYP3A4 metabolises atorvastatin in the gut and liver, so anything that inhibits 3A4 raises plasma levels and the myalgia risk depending on dose: grapefruit juice, clarithromycin, and at high doses curcumin and quercetin all sit on that pathway. Statin myopathy is uncommon but distinctive. Bilateral proximal muscle ache, sometimes with CK rising on a blood draw. Supplement interactions are mostly additive lipid lowering (berberine, plant sterols, red yeast rice) and additive myopathy risk with niacin at high doses. Neither is a reason to avoid combining; both are a reason to ask for a lipid panel sooner than your usual annual review.
Below are the 10 documented pairs we have explicitly assessed against Atorvastatin in the Distil database: 1 red, 7 amber, and 2 green. The pairs cluster around 6 mechanisms: Additive muscle toxicity, Additive lipid lowering, CYP3A4 induction, CYP3A4 inhibition, Additive HMG-CoA reductase inhibition, and OATP transporter inhibition (reduced absorption). Every call is cited to either a clinical reference (PMID) or the British National Formulary. Anything not on this list is either still to be assessed or beyond our database scope. The checker beneath surfaces assessments by supplement, and the missing-item form at the bottom of the page routes any uncatalogued supplement into our next curation pass.
Documented interactions
Additive muscle toxicity
Red yeast rice is a statin. It naturally contains monacolin K, which is the same molecule as the prescription statin lovastatin. Taking it on top of atorvastatin means you are taking two statins at once, which may raise the risk of muscle damage, including a serious form called rhabdomyolysis. Do not combine the two without your GP's guidance.
High-dose niacin combined with atorvastatin raises myopathy risk, though less than with simvastatin. If you take both, watch for unexplained muscle pain and tell your GP.
Additive lipid lowering
Berberine lowers LDL cholesterol and triglycerides on its own. Combined with atorvastatin the effect is additive, which is sometimes useful and sometimes pushes lipids lower than your GP intended. If you take both, ask for a lipid panel sooner than usual after starting.
Oat beta-glucan lowers LDL cholesterol by trapping bile acids in the gut, a different route from how a statin works. Taking the two together is complementary, not a harmful clash, and the small extra cholesterol reduction is a benefit. We treat this pair as safe to combine.
CYP3A4 induction
St John's Wort tends to reduce how well atorvastatin lowers your cholesterol by speeding up its breakdown. If you take St John's Wort with atorvastatin, talk to whoever prescribes it, as your cholesterol may need rechecking and your dose may need adjusting.
CYP3A4 inhibition
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.
Quercetin may slow how the body clears atorvastatin via CYP3A4, which can raise atorvastatin levels. Watch for muscle pain or unusual fatigue and tell your GP if you take both regularly.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Additive HMG-CoA reductase inhibition
Bergamot's active flavonoids inhibit the same liver enzyme atorvastatin targets, so combining them has overlapping mechanisms and no proven additive benefit. There is also a CYP3A4 surface that could slow atorvastatin clearance. Discuss with your GP before combining; in most cases the answer is to choose one or the other.
OATP transporter inhibition (reduced absorption)
Green tea extract may lower the amount of atorvastatin your body takes up, because both rely on the same cell transporter. This is suggested by reviews of related statins rather than by a direct atorvastatin study, so the size and importance of any effect are not yet clear. Keeping your green tea extract intake steady and telling your prescriber you take it is a reasonable precaution, particularly around a cholesterol check.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Other
Statins do reduce plasma CoQ10 levels, but the best-quality randomised trials show that taking CoQ10 alongside a statin does not reliably reduce muscle pain or improve other statin side effects. We treat the pair as safe to combine. If you find it helps you personally that is fine, but the evidence for routine use is weak.
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 (food-supplement interactions only; for drug-drug interactions, the BNF is authoritative). Use the checker below to surface any supplement, 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.