Sleeping Disorder and Medical Marijuana

Hi, "my friend" is having trouble sleeping at night; he's been awake three nights straight with barely any sleep, even trying melatonin pills that he has which make you drowsy and help you to fall asleep, but this did not help. the only sleep he's gotten was because of the exhaustion you get after highs from smoking marijuana, and has been the only thing able to get him to sleep, even diliberately smoking in the morning to get some rest. at night, he just doesnt feel tired at all, is fully awake, and cannot fall asleep. sometimes when he lies down on his bed before being asleep, he has trouble breathing, but probably not sleep apnea as its before beingasleep, but could just be from mental thought of it that his body follows as if it is real, as he describes it "like my brain doesnt know how to breath or fall asleep". it could be described as he has to "regulate" his breathing, and the high from the marijuana distracts from this and gets him to sleep.he constantly stretches in bed, but that could be from the result of lying in bed for hourswithout falling asleep. he does not feel tired at all at night, and just cannot sleep. what kind of sleep disorder does he have, any in particular? and as marijuana has been the only thing to get him to sleep, could a medical marijuana prescribtion be issued, and also could it be prescribed if he was under 18? he lives in california where medical marijuana is legal. thanks for all help, please post (the sooner he can see a doctor and get some sleep the better)