Im currently on 20mg of celexa (citalopram) and 150mg of wellbutrin (bupropion). and was wondering if i can supplement with 1300mg of cold pressed evening primrose oil?

Since the FDA doesn't investigate supplements, most physicians don't endorse them for fear of contaminants that could interact with medications, uncertainty about dosing &claims of efficacy. You're taking 2 psychoactive meds & concern for interaction would be a sensible reason not to use primrose oil. Consult your MD or pharmacist for more advice.