Riding the Unicorn

It started off innocuously enough. Just a nibble of a mushroom grub here, or a sip of carrion crawler mucus there. Just a little something to help Chisha get her buzz on.
Over time, Chisha's penchant for meticulous note-taking and systematic exploration lead to her developing and cataloguing a large number of physiologically active substances and effective mixtures
This ballooned over the years, to Stot's occasional consternation.
Life for Chisha these days is rarely a sober experience. She is never without her mixing box - a complicated wooden cylinder with twistable rings, emblazoned with a variety of symbols and shapes. With swift twists, she constructs a dose from a number of pre-prepared ingredients, before either eating or snorting the product, or rubbing the paste on her gums
She claims to have a drug for every problem and seems to be able to back this up. She has a varied mix of uppers and downers, steroids and hallucinogens, all-rounders and antibiotics, flushers and counters. She even has a few that defy the usual classifications, sprinkled with ingredients of magical origins. Her drugs aren't limited to problems within her own skin, with a few of her more ambitious experiments doubling as poisons.
Chisha occasionally tries to include Stot in her journey, but Stot always carefully declines. Chisha's years of careful and methodical abuse and goblin genealogy has left her with a unique biology, able to metabolise a drug load high enough to kill an ogre, and is only getting stronger every day. 
Stot is of two minds - she is proud of Chisha's ability to ride a wave like this one, but afraid for the day when Chisha's supply finally runs dry