SAFE — No Known Interaction
🟢 SAFE — Vitamin B12 and Simvastatin can be taken together safely.
Evidence level: MODERATE
Vitamin B12 and Simvastatin are safe to take together. No interaction has been documented between this supplement and statin medications.
No clinically significant interaction between Vitamin B12 and Simvastatin has been documented in medical literature or FDA drug labeling.
Taking Simvastatin? Statins like simvastatin and lovastatin work best when taken in the evening. Vitamin B12 can be taken at any time of day. If you experience muscle pain or weakness on your statin, ask your doctor about adding CoQ10 before making any changes to your regimen.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Vitamin B12 can be taken at a separate meal. High-dose niacin (B3) combined with statins increases myopathy risk. Normal dietary B3 is fine. Other vitamins are generally safe alongside statins.
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 Vitamin B12 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.
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
Vitamin B12 and Simvastatin are safe to take together. No interaction has been documented between this supplement and statin medications.
Take Simvastatin in the evening when hepatic cholesterol synthesis peaks (exception: atorvastatin and rosuvastatin have long half-lives and can be taken any time). Vitamin B12 can be taken at a separate meal. High-dose niacin (B3) combined with statins increases myopathy risk. Normal dietary B3 is fine. Other vitamins are generally safe alongside statins.
Monitor for muscle and liver effects when combining Vitamin B12 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.
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
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).