Actually, Steve, if I'm remembering correctly, pot is a depressant. If you're not depressed to start with, it's not so bad. If you are depressed ... well, let's just say I've known people to lose entire days to it. And an ex of mine who was on two different anti-depressants used to get frustrated because they weren't working so well. The fact that he was drinking 4 or 5 drinks every night and smoking at least 4 joints didn't help things.
So, while it may relax your muscles and calm things down a little, beware the folly that says it 'helps' with depression, OK?