Tanghinin

Tanghinin is a crystalline body extracted from the kernel of Tanghinia venenifera (natural order Apocynaceæ), which grows in Madagascar. It is a deadly poison, acting upon the heart like digitalis, strophanthus, and their allies, but possessing a convulsant action which these lack. Like digitalis it excites vomiting. Tanghin, an extract made by the Malagasy from the kernel, was used by them for the judicial Ordeal (q.v.).