in Chavín culture, we have "a wealth of circumstantial evidence relating to altered states of consciousness" (389)
the San Pedro cactus, native to the region, is used to make Huachuma, a "mescaline-based infusion"
vilca leaves, also native to the region, "contain a powerful hallucinogen. Released when the leaves are ground up and snorted, it induces a gush of mucus from the nose, as faithfully depicted on sculpted heads that line the walls of Chavin's major temples"