SAFE — No Known Interaction
🟢 SAFE — Ashwagandha and Simvastatin can be taken together safely.
Evidence level: LIMITED
Ashwagandha does not interfere with Simvastatin's cholesterol-lowering mechanism. However, it is worth noting that Simvastatin is metabolized by CYP3A4, and while ashwagandha has only minimal effect on this enzyme at normal supplement doses, extremely high doses of ashwagandha could theoretically slow Simvastatin metabolism slightly. At standard doses (300-600mg), this is not a practical concern.
No clinically significant interaction between Ashwagandha and Simvastatin has been documented in medical literature or FDA drug labeling.
Simvastatin should be taken in the evening because cholesterol synthesis peaks overnight, and this statin has a short half-life. Ashwagandha can be taken at any time. If taking both in the evening, this is fine — there is no absorption competition. Avoid grapefruit juice with Simvastatin (it strongly inhibits CYP3A4), but ashwagandha does not cause this same level of enzyme inhibition.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Ashwagandha 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 Ashwagandha 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 Ashwagandha, try Hermetica Superfoods' clinically-dosed blends at hermeticasuperfoods.com
Ashwagandha does not interfere with Simvastatin's cholesterol-lowering mechanism. However, it is worth noting that Simvastatin is metabolized by CYP3A4, and while ashwagandha has only minimal effect on this enzyme at normal supplement doses, extremely high doses of ashwagandha could theoretically slow Simvastatin metabolism slightly. At standard doses (300-600mg), this is not a practical concern.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Ashwagandha 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 Ashwagandha 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 Ashwagandha, 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).