Personally, I'd never go to my PCP for psych meds ever again. All she would prescribe were different SSRI's, which I don't tolerate well. She also didn't pick up on the fact that I'm bipolar, and SSRI's send me in to hypomania. My p-doc diagnosed me with bipolar and we've been working to find the right meds. However, even before the bipolar diagnosis, he was much more willing to explore other meds to help with anxiety. He took my word that SSRI's and I don't mix, and went down a different road for treatment.

I think pdocs are generally just more knowledgeable about psych meds and more willing to explore all options with a patient.