From Thomas De Quincey’s Confessions of an Opium Eater:

I was stared at, hooted at, grinned at, chattered at, by monkeys, by paroquets, by cockatoos. I ran into pagodas: and was fixed, for centuries, at the summit, or in secret rooms; I was the idol; I was the priest; I was worshipped; I was sacrificed. I fled from the wrath of Brama through all the forests of Asia: Vishnu hated me: Seeva laid wait for me. I came suddenly upon Isis and Osiris: I had done a deed, they said, which the ibis and the crocodile trembled at. I was buried, for a thousand years, in stone coffins, with mummies and sphinxes, in narrow chambers at the heart of eternal pyramids. I was kissed, with cancerous kisses, by crocodiles; and laid, confounded with all unutterable slimy things, amongst reeds and Nilotic mud.

Marcus Boon’s book The Road of Excess examines the use of drugs as an aid to writing. The following passage from Sartre is also alleged to have been written under the influence:

But it should be noted that this regulatory totalisation realises my immanence in the group in the quasi-transcendence of the totalising third party; for the latter, as the creator of objectives or organiser of means, stands in a tense and contradictory relation of transcendence-immanence, so that my integration, though real in the here and now which define me, remains somewhere incomplete, in the here and now which characterise the regulatory third party. We see here the re-emergence of an element of alterity proper to the statute of the group, but which here is still formal: the third party is certainly the same, the praxis is certainly common everywhere; but a shifting dislocation makes it totalising when I am the totalised means of the group, and conversely.