The only side effects I've ever had from smoking weed on and off for 33 yrs...is I don't have dreams at night,I've given it up a few times,I regularly go a few weeks or months without it,every year ,I use it ,it doesn't control me ,that I got to lose my head and smash up the Mrs and house easy come easy go Keith...our government tell you it's no good for you...but we export more medicinal cannabis per yr than any other country...and guess who owns and runs it all? Our government...says it all