I have a character who uses drugs in the beginning of the story that is set somewghere vaguely golden age of piracy-ish period,. (Think PotC wbut without the undead monkeys). I want him to use something ythat is closer to modern-day cocaine or met, b8ut googling has not really helped me that much. I know that coca leaves were apparently used for drugging even then, but what was the exact method? Were they just chewed on? Also, would buurning coca leaves in a pipe be possibly jarmful for an old man with an ailing health?