No-No and Purple are entertaining-- but I think you can stand at least one more kind of drug.
What about drugs which take Glitches on hallucinatory journeys to imaginary locations-- move the glitch to a strange screen filled with really weird stuff? Or drugs which cause glitches to see things which aren't normally there? What about NPCs, like pink elephants, which the player can only see or talk to if they are high? If you ask me, the current effect that Purple has is pretty weak. It could be a lot more interesting if the 'trip' itself were more interesting or complicated.