Combination safety
Herb × Herb Interaction Checker
Stacking herbs isn't always safer than one. This tool screens multi-herb protocols for additive effects (sedation, bleeding, hypotension), antagonism, and traditional contraindications from clinical herbalism sources.
Common clusters
Common additive-effect clusters
Bleeding / antiplatelet stack
Each one is mild; three together is meaningful:
Garlic · Ginger · Ginkgo · Ginseng · Turmeric · Fish oil · Vitamin E · Willow
Additive sedation stack
Watch for next-morning grogginess:
Valerian · Kava · Passionflower · Hops · California poppy · Chamomile (high dose) · Magnolia bark
Blood pressure lowering stack
Risk of symptomatic hypotension on BP meds:
Hawthorn · Olive leaf · Hibiscus · Mistletoe · Garlic · Reishi
Adrenal adaptogen overlap
Usually fine; watch for overstimulation with sensitive users:
Ashwagandha · Rhodiola · Eleuthero · Ginseng · Schisandra · Holy basil
Good-practice principles
- Start with one herb, give it 2-4 weeks before adding another.
- Traditional formulas (herb combinations) usually have centuries of real-world safety data — prefer them over novel stacks.
- Keep a list of everything you're taking, including supplements and OTC drugs — show it to your prescriber.
- Pulse or cycle stimulating adaptogens (rhodiola, ginseng) — 6 weeks on / 1 week off is a common rhythm.