Opiate

Opiates is the collective name of drugs (alkaloids) derived from opium. The alkaloids originate from the opium poppy.

Types of opiates

 * Codeine
 * Laudanum
 * Morphine

Characters poisoned with opiates

 * Celia Austin - Hickory Dickory Dock
 * Dora Bunner? - A Murder is Announced
 * Rosaleen Cloade (actually Eileen Corrigan) - Taken at the Flood
 * Mary Gerrard - Sad Cypress
 * Jessie Hopkins - Sad Cypress (self inflicted)
 * Bobby Jones - Why Didn't They Ask Evans? (not fatally)
 * Elizabeth Moody - By the Pricking of My Thumbs
 * Mr Paynter - The Big Four
 * Miss Sharples - Curtain
 * Sobek? - Death Comes as the End
 * Laura Welman - Sad Cypress
 * Yahmose? - Death Comes as the End (self inflicted)
 * A young shepherd - Death Comes as the End

Characters who are addicted to opiates

 * Henry Bassington-ffrench - Why Didn't They Ask Evans?