Can I Take These?

Can You Take Ashwagandha and Caffeine Together?

No documented interaction was identified between ashwagandha and caffeine in the sources reviewed.

No documented interaction identifiedEvidence: Moderate

See the full Ashwagandha page and Caffeine page for other reviewed interactions and reference information.

What the interaction means

NCCIH's ashwagandha fact sheet names six medication classes it may interact with (diabetes medicines, high blood pressure medicines, immunosuppressants, sedatives, anticonvulsants, and thyroid hormone medications) -- caffeine is not among them, and MedlinePlus's caffeine page does not mention ashwagandha. A 2024 laboratory study also tested ashwagandha extracts against CYP1A2, the liver enzyme that metabolizes caffeine, and found no clinically meaningful inhibition.

No documented interaction between Ashwagandha and Caffeine was identified in the authoritative sources reviewed. This is not a guarantee that no interaction exists for every dose, formulation, or individual -- it means the sources checked did not document one.

Practical context

Ashwagandha's NCCIH fact sheet and caffeine's MedlinePlus page were checked directly, full text, in both directions. A 2024 in vitro pharmacokinetic study (Drug Metabolism and Disposition) that measured ashwagandha's effect on CYP1A2 -- the enzyme responsible for most caffeine metabolism -- was also reviewed: it found no reversible CYP1A2 inhibition by ashwagandha root or leaf extracts at physiologically relevant concentrations. This is reassuring mechanistic evidence against a metabolic interaction, but it is a laboratory study, not a clinical trial of the two taken together in people.

What the sources say

Caffeine — MedlinePlus, U.S. National Library of MedicineAshwagandha — National Center for Complementary and Integrative Health (NIH)Evaluation of reversible cytochrome P450 inhibition by Withania somnifera leaf and root extracts — Drug Metabolism and Disposition

Last reviewed 2026-08-25

Medical information disclaimer: this information is general and educational. It does not diagnose conditions, prescribe treatment, or determine whether a combination is safe for you personally. Follow your prescription label and ask a pharmacist or clinician before starting, stopping, or combining products. Full disclaimer.

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