I can only tell from my experiences. I was a heavy pot smoker for several years, the results from that were:
- It massively pushed my insecurity. This is something i´ve seen happen to many pot smokers, but only for those who hadnt that much confidence anyway. But for 90% of my friends who smoked, there were some negative results on their daily routine behavior.
- It slowed down massively my ability to think. I was a really fast logical thinker before i begun to smoke, and after that it slowed heavily down. It affected my creative thinking so much, that its nearly gone and i never recovered from that. And i stopped smoking 10 years ago (with 22, im 32 now)!
- I once got some very strong stuff (supposedly dna manipulated from the netherlands), which caused an overreaction on my body, my pulse was about 230 for 30mins. That was a point where i saw the "other side", i was nearly about to go home. At that point i stopped smoking, and as im a bit sensible, i needed several years to overcome this fearful experience.
As i said, i was a heavy smoker, i used to smoke every day. I believe that every stuff that influences your normal view isnt good for brain and body in the end, but of course it depends on the frequency of usage. Someone who smokes 1-2 times a month shouldnt have much problems with it. The same for most pain killers, alcohol or whatever.
For me, it
would interfere with meditation, as i want to be as most clear as possible to be able to see the truth, to see behind the curtain. Every substance that could possibly interfere with that, is a no no for me. But i also believe that some drugs can take you to points, where you can learn something... its just another path, which maybe one day leads you to a drugfree life, because life
itself is the drug.
My 5 cents

Pan