i think they found marijuana on the mummy of ramses II.

also the blue lily (of the famed lotus eaters part of homer's odyssey) is an opiate drug found in egypt--the lotus eaters therefore are the egyptians.

You are right, this is actually very interesting, it can change our perception about drugs. We talked a lot about drugs in late years and we consider them current issue when in fact drugs existed since ancient times. I wonder if they even had an ancient form of ...

Nicotine is found in some old world plants e.g. mandrake as well as the new world tobacco and cocaine is probably found in traces in plants the Egyptians could have got without contact with America.
Lettuce contains something very similar to opium.

Also cannabis is an old world plant - varieties with low narcotic contents are usualy known as hemp and are grown as a source of fibre - in Medieval Europe it was a significant food plant and a major source of cloth.