Echinacea and medications.
Echinacea is not in the Distil recommendation database. We surface it here deliberately, because why a compound is left out is as useful as what we recommend.
Echinacea is popular for colds, and the cold evidence itself is mixed-to-weak. The reason it is outside the Distil database is narrower: echinacea is immunomodulating rather than a simple immune booster, and there are documented case reports of it precipitating autoimmune flares (Lee and Werth 2004). For most healthy people that is harmless. But for anyone on an immunosuppressant, after a transplant, living with HIV, or with an autoimmune condition treated with a biologic or a DMARD, that flare signal plus the general caution around nudging an already-managed immune system are enough to keep it out.
The Distil pipeline screens for exactly those situations, and it cannot safely carry an immune stimulant across them, so echinacea stays out. The options below have a better evidence base for the immune goal.
What to consider instead. Every option below is in the Distil database, so you can check each against your own medications:
- Zinc Bisglycinate: zinc at the first sign of a cold has the strongest data here
- Vitamin D3: correcting a low level supports normal immune function
- Elderberry: some evidence for symptom duration; also screened out in immunosuppression
We still hold the documented interactions for Echinacea, which is why it stays in the interactions checker even though we do not recommend it. Below are the 4 documented pairs we have explicitly assessed: 4 caution. Every call is cited to a clinical reference (PMID) or the British National Formulary.
Documented interactions
Last reviewed 14 September 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.
Immunosuppression caution
Caution Does Echinacea interact with Ciclosporin?
Ciclosporin works by calming the immune system down, which is what stops your body rejecting a transplant or quietens a condition such as psoriasis or arthritis, and echinacea is taken to support the immune system, so it may work against ciclosporin. Echinacea can also change how the body clears medicines that are handled like ciclosporin: in one volunteer study it sped that clearance up in the liver while slowing it in the gut, and a second found an overall speeding-up, so the effect on your ciclosporin level could go either way. Echinacea has not been studied with ciclosporin, so do not start it without talking to your transplant or specialist team.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Caution Does Echinacea interact with Everolimus?
Everolimus works by calming the immune system down to stop your body rejecting a transplant, or, at a different dose, as part of cancer treatment, and echinacea is taken to support the immune system, so it may work against everolimus. Echinacea can also change how the body clears medicines that are handled like everolimus: in one volunteer study it sped that clearance up in the liver while slowing it in the gut, and a second found an overall speeding-up, so the effect on your everolimus level could go either way. Echinacea has not been studied with everolimus, so do not start it without talking to your specialist who manages your everolimus.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Caution Does Echinacea interact with Sirolimus?
Sirolimus works by calming the immune system down so your body does not reject a transplant, and echinacea is taken to support the immune system, so it may work against sirolimus. Echinacea can also change how the body clears medicines that are handled like sirolimus: in one volunteer study it sped that clearance up in the liver while slowing it in the gut, and a second found an overall speeding-up, so the effect on your sirolimus level could go either way. Echinacea has not been studied with sirolimus, so do not start it without talking to your transplant team.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
Caution Does Echinacea interact with Tacrolimus?
Tacrolimus works by calming the immune system down, which is what stops your body rejecting a transplant or quietens an autoimmune condition, and echinacea is taken to support the immune system, so it may work against tacrolimus. Echinacea can also change how the body clears medicines that are handled like tacrolimus: in one volunteer study it sped that clearance up in the liver while slowing it in the gut, and a second found an overall speeding-up, so the effect on your tacrolimus level could go either way. Echinacea has not been studied with tacrolimus, so do not start it without talking to your transplant or specialist team.
Evidence: No direct study of this exact combination yet; the caution rests on a plausible mechanism or on reports involving a related medicine.
Reviewer-flagged: awaiting clinical-reviewer sign-off.
What this page does not say. Leaving a compound out of our recommendations is not a verdict that it is useless for everyone. It is a statement about safety, evidence, or interaction load in the context Distil screens for. Discuss any supplement decision with whoever manages your prescriptions.
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How the checker decides
Every result has a source
Each pair we have assessed is cited to a published study (PMID) or the British National Formulary, so you can read the source yourself.
Four kinds of answer
Severe, caution, no known interaction, and not yet assessed. A pair we have not assessed is never shown as clear.
- Severe
- Caution
- No known interaction
- Not yet assessed
Nothing in our data is not a clearance
When nothing in our data records a problem with a pair, the result says no known interaction at typical doses, which is not a clearance: your pharmacist or GP can check the pair against your full medical history.
A 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 until 30 June 2027 · £79 from 1 July 2027.
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