cancer) and beneficial effects on the immune system.
In this Article
Reishi mushroom is POSSIBLY UNSAFE when taken by mouth in a powdered form for more than one month. Use of powdered reishi mushroom has been associated with toxic effects on the liver.
Reishi mushroom can also cause other side effects including dryness of the mouth, throat, and nasal area along with itchiness, stomach upset, nosebleed, and bloody stools. Drinking reishi wine can cause a rash. Breathing in reishi spores can trigger allergies.
Special Precautions & Warnings:Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking reishi mushroom if you are pregnant or breast feeding. Stay on the safe side and avoid use.
Bleeding disorder: High doses of reishi mushroom might increase the risk of bleeding in some people with certain bleeding disorders.
Low blood pressure: Reishi mushroom seems to be able to lower blood pressure. There is a concern that it might make low blood pressure worse and could interfere with treatment. If your blood pressure is too low, it is best to avoid reishi mushroom.
A clotting disorder called thrombocytopenia: High doses of reishi mushroom might increase the risk of bleeding in people with thrombocytopenia. If you have this condition, do not use reishi mushroom.
Surgery: High doses of reishi mushroom might increase the risk of bleeding in some people if used before or during surgery. Stop using reishi mushroom at least 2 weeks before a scheduled surgery.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.