no
Although it is impossible to know for sure, the species Amanita muscaria was likely the first mushroom used as a hallucinogen.
Hallucinogen
Preservative. Can be a weak local anesthetic, or sedative-hypnotic; it isn't medically used today, but has some (small) history as a recreational drug.
yes, but they were not as medically advanced as we are today
that is what its used for...
Yes, Marijuana is used both medically and recreationally both in the present and in the past.
hallucinogen
Yes, PCP is a dissociative hallucinogen.
Hallucinogen
Yes, marijuana is a mild hallucinogen.
its a depressant
Not sure about ancient usees, but today oxygen is used for oxygen therapy- medically. As well as at Oxygen bars for recreation.