Native to the arid lands of Mexico and the southern United States, Mexican prickly poppy, with its bright yellow flower recalling the poppy, spread to many tropical regions where it was adopted by folk traditions. Its yellow-orange sap and harsh seeds earned it a reputation as an aid for troubled skin and stubborn pain, always handled with circumspection by the old herbalists.
The yellow latex drawn from the stem was traditionally dabbed, in small amounts, onto warts, corns, or stubborn skin lesions. It was also credited with a use for fungal skin conditions in certain folk pharmacopoeias.
A mild decoction of root or leaf was sometimes used as a rub or compress to ease muscle and joint pain, according to uses recorded in Central America and South Asia.
The crushed leaves, as a poultice, were part of traditional care for abscesses and boils, in the hope of helping them come to a head.
The oil extracted from the seeds, known to be irritating, was used only in very limited external applications, never in food preparation, because of its long-recognized toxicity.
A toxic plant: the latex and seeds contain alkaloids (including sanguinarine) that can cause serious poisoning, notably toxic oil syndrome in cases of ingestion or food contamination. Internal use is strongly discouraged without supervision by a health professional qualified in herbal medicine. Contraindicated for pregnant or breastfeeding women, as well as young children. External use of the latex should remain occasional and localized; avoid any contact with the eyes and mucous membranes.
Partner herbalists — available with the detailed notebook.
PFAF, PubMed, Wikipedia