Hi, I Am Taking Venlafaxine Hcl Er 150; And Bupropion

Hi, I am taking venlafaxine Hcl er 150; and bupropion hcl xl 300 mg, , I was wondering if these two should be taken together..? My pharmacist told me to mention to my Dr. that these two should not be taken together, and anthem, my insurance, is calling me about the same thing. I mentioned it to my Dr., but she just acted like it wasn’t a problem? Can you explain to me the problem?