I used to smoke pot, but I stopped because it was making me paranoid and interfering with my sleep cycle. It was giving me a lot of weird dreams, which is not what you need when you have PTSD. If you can smoke it without getting paranoid (or fat, haha), then go ahead for recreational reasons. I don't think it would alleviate PTSD, though. If you have PTSD, you are probably better off seeing a psychiatrist who can prescribe something more targeted. Don't tell him you smoke pot, though. He might turn you away.