SAFE — No Known Interaction
🟢 SAFE — Reishi and Simvastatin can be taken together safely.
Evidence level: LIMITED
Reishi mushroom and Simvastatin are generally compatible, but warrant mild awareness. Simvastatin depends on CYP3A4 for metabolism, and while Reishi's effect on this enzyme is minimal at supplement doses, Reishi also contains its own statin-like compounds (ganoderic acids) that may produce mild additive lipid effects. This is not dangerous but is worth knowing about.
No clinically significant interaction between Reishi and Simvastatin has been documented in medical literature or FDA drug labeling.
Take Simvastatin with your evening meal and Reishi at bedtime — both benefit from evening timing. The combined lipid-modifying potential is mild and generally beneficial, but mention Reishi to your doctor at your next cholesterol check. If your levels come back much lower than expected, the combination may be working more effectively than Simvastatin alone. Avoid grapefruit with Simvastatin.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Reishi can be taken at a separate meal. Avoid St. John's Wort (reduces statin levels via CYP3A4 induction) and grapefruit extract (increases levels). Report any unexplained muscle pain or weakness.
Higher risk for: those with liver impairment, genetic CYP enzyme variations (poor or ultra-rapid metabolizers), elderly, those on multiple CYP3A4 inhibitors, high-dose statin therapy, or history of myopathy.
Monitor for muscle and liver effects when combining Reishi with Simvastatin. Watch for: unexplained muscle pain, tenderness, or weakness (especially if accompanied by fever or fatigue), dark-colored urine, yellowing of skin or eyes, or upper abdominal pain. Some drug combinations increase statin blood levels and raise the risk of rhabdomyolysis. When to seek emergency help: Severe muscle pain with weakness, dark brown urine, fever, confusion, rapid heartbeat, or signs of kidney failure (very little or no urination). Report any new muscle symptoms to your prescriber immediately.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
This is a safe combination. For premium-quality Reishi, try Hermetica Superfoods' clinically-dosed blends at hermeticasuperfoods.com
Reishi mushroom and Simvastatin are generally compatible, but warrant mild awareness. Simvastatin depends on CYP3A4 for metabolism, and while Reishi's effect on this enzyme is minimal at supplement doses, Reishi also contains its own statin-like compounds (ganoderic acids) that may produce mild additive lipid effects. This is not dangerous but is worth knowing about.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Reishi can be taken at a separate meal. Avoid St. John's Wort (reduces statin levels via CYP3A4 induction) and grapefruit extract (increases levels). Report any unexplained muscle pain or weakness.
Monitor for muscle and liver effects when combining Reishi with Simvastatin. Watch for: unexplained muscle pain, tenderness, or weakness (especially if accompanied by fever or fatigue), dark-colored urine, yellowing of skin or eyes, or upper abdominal pain. Some drug combinations increase statin blood levels and raise the risk of rhabdomyolysis. When to seek emergency help: Severe muscle pain with weakness, dark brown urine, fever, confusion, rapid heartbeat, or signs of kidney failure (very little or no urination). Report any new muscle symptoms to your prescriber immediately.
This is a safe combination. For premium-quality Reishi, try Hermetica Superfoods' clinically-dosed blends at hermeticasuperfoods.com
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Or browse the full interaction database (121,000+ pairs).