Weed intensifies the flow of chemicals to your brain, sometime up lifting. Though when you do come down from the high you do become anxious, depressive and sometimes even angry. Also if you already are one of those things it's only going to make it worse. You can become easily paranoid.

If your already on med's for OCD, and you smoke its can mess up your bodies reaction to the med's and not work. My honest opinion, don't smoke up.