Marijuana longer-term effects

Data on the longer-term effects of marijuana unfortunately arc sparse and difficult to interpret. The research that has been conducted has focused on four central systems respiratory, cardiovascular, immune, and reproductive. 

It appears the majority of effects associated with marijuana use are more acute than chronic and that longer-term effects tend to be reversible with the termination of drug use. Significant exceptions may occur, however. Smoking marijuana may be found to be linked to various respiratory disorders, including cancer. Most of the negative effects found arc correlated with higher doses and frequency of use than those described by most cannabis smokers in this country. Nevertheless, these indications arc tentative and await confirmation from more systematic and controlled research. 

---