After I smoke my mind is very active for about 24 hours. What I've found is that I can't concentrate on school work. My mind keeps wandering off.

The system of homework then smoke works fine though.
THClord Reviewed by THClord on . Weed causes temporary decrease in intelligence? I've been an occasional smoker for 7 months, one or twice a week usually. Lately I've been wondering if weed can cause a temporary decrease in mental ability. I'm very interested in math and science - I get good marks, usually 90s, and I intend on studying physics next year at university. As such, I highly value my mental agility and problemsolving ability. Now it could just be me, but I've noticed that sometimes after I smoke, for about 24-48 hours, I am slightly less able comprehend math and Rating: 5