What is quinine?

Didn't the guy who invented quinine die on a boat?

quinine - meme gif

An old school cutting agent used in Heroin. It intensifies the rush of an intravenous injection of heroin.

Yo remember back in the day when they used quinine to cut the dope now its cut with fentanyl and god knows what else.

A white powder that is commonly used to cut cocaine with. This was part of the reason it is highly regulated.

i have been cutting my cocaine with quinine so that i can afford an overseas bride that can speak english and has all her fingers