Mayo Clinic: Teens with chronic pain should not use medical marijuana – CBS News

Smoking too much marijuana can also carry risks, including distorted perceptions, difficulty with coordination, difficulty problem solving and having a hard time learning and memorizing. Marijuana can also cause dizziness, anxiety, sedation, fatigue and a lack of motivation, the Mayo Clinic reported.

Huh, I’m not sure whether or or not they are saying those effects are temporary or longterm.