Top ten imaginary drugs in fiction

Jeff Noon's latest novel is A Man of Shadows.

One of his top ten "modern examples from the pharmacopoeia of dangerous delights" in fiction, as shared at the Guardian:Substance D (A Scanner Darkly by Philip K Dick)

Dick is perhaps the most prolific of the drug inventors. He used it as plot generator, a source of transformative energy – and a way to both escape reality and experience it more