"If patients don't have access (to pharmacists), they run the risk of adverse effects from drug interactions."
If the pharmacist isn't there to fill the prescription, maybe the doc's will have to write less - this would certainly go a long way toward reducing adverse drug interactions.
Unless you are seeing a quack or the patient is a hypochondriac, I doubt your doctor is writing prescriptions just for the fun of it. The patient obviously needs the medication or they wouldn't be seeing a doctor.