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Drug interactions

Echinacea + Mechlorethamine

Severity: Minor

Echinacea and Mechlorethamine: minor interaction.

Last updated

For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.

Summary

Echinacea has immunostimulatory properties that might oppose the immunosuppressive and cytotoxic effects of alkylating chemotherapy. The relevance to mechlorethamine is theoretical, especially with topical use, and no clinical reports exist.

What this interaction means in plain words

Echinacea and Mechlorethamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.

Echinacea belongs to Gastrointestinal Tract; Mechlorethamine belongs to Oncology.

Evidence level: Low

Why it happens

Theoretical pharmacodynamic opposition from herbal immune stimulation.

What to do

Advise patients on systemic chemotherapy to avoid echinacea unless the oncology team agrees. No special monitoring beyond routine response assessment is needed.

What to ask your pharmacist

  • Is there anything I should notice while taking both?
  • Do I need to tell my doctor at the next visit?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Echinacea with Mechlorethamine?

MediHelp rates the interaction as minor. Echinacea and Mechlorethamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Echinacea has immunostimulatory properties that might oppose the immunosuppressive and cytotoxic effects of alkylating chemotherapy. The relevance to mechlorethamine is theoretical, especially with topical use, and no clinical reports exist.

How serious is the interaction between Echinacea and Mechlorethamine?

MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients on systemic chemotherapy to avoid echinacea unless the oncology team agrees. No special monitoring beyond routine response assessment is needed.

What other medicines interact with Echinacea?

MediHelp also lists interactions of Echinacea with, for example, Alefacept, Antithymocyte globulin equine, Antithymocyte globulin rabbit. The full list is on the Echinacea page.

Full monographs, dosing and an interaction checker in the MediHelp app

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