imagine yourself with both degrees. Now, not only can u diagnose patient disease states, BUT you can tailor a medication schedule that will maximize the drug benefit to get your patient better.
How many times have you or heard of someone at a doctors office that gets seen, diagnosed, and gets a prescription that doesnt work for them? the patient then has to return to the doctors office, pay another copay and get another script... who wants to go through that?
As a PharmD/PA, (and lots of diagnosing pratice), you will be able to get your patients better faster, inform them on the correct way to take the med, answer any and all questions, and save them money at the same time. in fact, when i was at my doc's office last week, he gave me a script for something. i asked him what it was for, to test him, and he gave me a not very good explaination.
However, if you choose this route as a career, dont expect to get more money than a regular PA.