How do marijuana and Prozac interact?

I have two friends who were recently diagnosed with depression. They were both prescribed Prozac by their respective doctors. Both of them are heavy marijuana users and both failed to mention that to their doctors. One has been on Prozac for two months and the other for six weeks. I have noticed that their behavior has become strange: mood swings, paranoia, oversleeping, fatigue. They continue taking their Prozac (20 mg a day) and continue smoking pot. I am afraid that there might be some negative interaction between the substances, one being an antidepressant and the other a depressant. Can you provide some insight?


What can I do if I have no privacy to masturbate?

I used to always masturbate at least once a day before I came here to college. However, now that I have a roommate, I can never find time alone to masturbate. I feel a need to masturbate at least once a day, but now I can't go through with my urge every day. Thus I start thinking about masturbation during class, and it's really affecting my mind. I need to masturbate or else I can't function correctly. Please help me out. Maybe there is another means to get out my sexual urges.