Six public APIs, no keys and no paywall. Queries are scoped to title and abstract rather than full text, because a full-text hit on Curcuma in a reference list is not evidence of anything. Everything retrieved is then passed through an interaction-vocabulary gate: a paper is admitted only if it actually describes an interaction, not merely because it names a plant and a drug in the same abstract. What survives is ranked against an eight-level evidence hierarchy, so a randomised trial outranks a review that cites it.
Essential-oil terpenes, capsaicinoids and phorbol-type diterpenes add to the barrier disruption caused by topical antiseptics, retinoids and keratolytics, and increase percutaneous absorption of anything applied with them.
Expected clinically: Contact dermatitis, chemical burn, photoirritation, unexpected systemic absorption from broken skin.