Regarding marijuana/MMJ and mental illness, drug interactions and also, warnings that ASAM, AMA, CMA and CPhA, along with the new California Medical Marijuana Safety Act, (MMSA) 

ASAM says in their latest research paper, that no one under 25 should be using MJ/MMJ, due to the fact that the brain is still developing until 25 years of age, ASAM-marijuana-cannabinoids-and-legalization-

League of California Cities®. Medical Marijuana – Revisited After New State Laws