Eserine

Eserine (or Physostigmine) is a toxic alkaloid which occurs naturally in the Calabar bean. Medically it is used to treat Glaucoma, and can be used as an antidote to hyoscine poisoning.

Characters poisoned with eserine

 * Barbara Franklin - Curtain (accidentally, she intended to murder her husband)
 * Aristide Leonides - Crooked House