Been smoking since I was 19; so 30 odd years.
My MJ 'tutor' was a then 53 year old professor of Economics. I remember finding his solemn tutorials and admonitions regarding how to use cannabis a bit tedious and overdone.
His rules and regs were as follows:
1. Always buy from a known source.
2. Never take more than two tokes of 'strange' (strange in his interpretation being smoke that you or a close stoner had not rolled, free party weed and first time buy/smoke weed) in the 1st 30 mins until you have gauged its efficacy/ or lack thereof.
3.don't mix weed with unfamiliar drugs or substances, you can never predict the chemical cocktail that will result.
4.Stop smoking when the desired effect has been achieved; it's not paracetamol, or aspirin where the box says adults take two tablets every 4 hours. YOU control the depth and quality of your high.
i have had one bad experience with cannabis - 17 years ago after I divorced my first husband I slid into depression. I was practically chain smoking cannabis day in day out for about 7 months and one afternoon I had a joint and the next thing I knew I woke up on the bathroom floor. I had fainted, I did not rush to the hospital or call a doctor I knew I fainted cos my body was saying mercy, enough.
The OP mentioned mixing powerful pain killers with cannabis hmmmmm.........
I am not sure why anybody would do that? It's like using morphine and an a general anaesthetic together.
Anyway 49 and still happily getting baked. :smoke:"My 2 cents"