Here is something answering the question about who can prescribe meds. (It used to be only physicians, but not anymore.)

Can Psychologists Prescribe Medications?

Personally, I wouldn't be too comfortable with anyone other than a physician prescribing meds. Actually, I'm not all that comfortable with the way psychiatrists prescribe meds. Since that's all that they can really do, I think they way overemphasize the role of medication in helping people with psychological pain. I think psych patients are very apt to end up way over-medicated because of this. That happened to me.

The best med management I ever got was from a regular family physician.