Herb-Drug Interaction Checker

Is it safe to combine these?

Check herbal supplements against your prescription and over-the-counter medicines. Sourced from NIH NCCIH, Memorial Sloan Kettering About Herbs and Examine.com. Brand names are resolved to their generic ingredient using the NIH RxNorm service.

How this works

Add every herb or supplement you take. Add every medication you take. We cross-check and flag known interactions, severe, moderate, or mild, with the mechanism and what to do about it.

SEVERE

Combination should be avoided. Documented case reports of harm.

MODERATE

Combine only under clinician supervision. Monitor closely.

MILD

Combination usually safe but worth knowing. Monitor.

Sources: NIH National Center for Complementary and Integrative Health (NCCIH), Memorial Sloan Kettering Cancer Center "About Herbs" database, Examine.com clinical evidence reviews, FDA herbal-supplement advisories. This tool covers commonly studied interactions but is NOT exhaustive. Absence of a flag does not guarantee safety. Always verify with your pharmacist before combining.