Can I take Chaga and Reishi together?
Drug interaction guide
Originally published 24 Jan 2026
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Taking chaga and reishi together may significantly increase the risk of bruising or bleeding. Both mushrooms have 'blood-thinning' properties, meaning they can slow down how quickly your blood clots. Combining them can have an additive effect, making it harder for your body to stop bleeding if you are injured. Additionally, both may lower blood sugar levels, which could lead to symptoms of low blood sugar (hypoglycaemia) such as dizziness or shakiness.
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Why this happens
Both chaga and reishi contain compounds that interfere with platelet aggregation (the way blood cells stick together to form clots). Chaga is also high in oxalates which can affect metabolism. Furthermore, both fungi possess hypoglycaemic properties, meaning they can both lower blood glucose through similar pathways in the body.
What you should do
Use caution when combining these supplements. If you are scheduled for surgery, stop taking both at least two weeks beforehand. You should consult your doctor before taking this combination if you are already taking prescribed blood thinners (like warfarin or aspirin), blood pressure medication, or diabetes medication. Monitor yourself for signs of unusual bruising, nosebleeds, or light-headedness.
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Using other medicines?
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
24 Jan 2026 | Originally published

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