I asked the same question a while ago. Im on effexor and wanted to relax and smoke some weed. As far as my research went and from the reply's I got, go ahead-- enjoy yourself, it should be fine. I did smoke a joint, but didnt really enjoy it like I use to, I guess I was to parnoid, but, like they say, if you dont succeed, try & try again.
You will be absolutely fine.
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"I could not/Speak, and my eyes failed, I was neither/Living nor dead, and I knew nothing" - T.S. Eliot, The Wasteland