Pilocarpine

Pilocarpine is a medication used to reduce pressure inside the eye and treat dry mouth. It can be used as an antidote for atropine poisoning.

In The Thumb Mark of St. Peter, when Geoffrey Denman was poisoned with atropine he tried to ask for pilocarpine, but both the cook and Dorothy the parlourmaid thought he was asking for a ‘pile of carp’.