A lot of plain untrue things said in this thread.
Would you be able to teach biology or chemistry at a university with a PharmD? Not unless they were really, really desperate. Which is highly unlikely, given that there are plenty of biology and chemistry PhD graduates who want a job.
Would you be able to teach such courses at a community college? Maybe. If they were getting pretty desperate. But then, you would need to be desperate too, because you can make a lot more money using your PharmD in almost any other way.
Would you be able to teach at pharmacy school? YES. And yes, you can get full professorship, tenure, blah blah blah. There are two types of faculty at pharmacy schools: clinical faculty, and all others (basic sciences + maybe some other random people for ethics, or electives, or what have you). Clinical faculty are all either PharmD or RPh, they are the people who teach practical applied pharmacy courses (therapeutics, most electives, pharmaceutical care type courses, etc.), and they are also the faculty for the students on rotation. There is A LOT of research they can do, or if they opt not to do research, they can hold a clinical position at the university hospital or equivalent, depending on the particular institution's policy. The non-clinical faculty are your basic sciences professors (pharmacology, pathology, physiology, medicinal chemistry, etc.) and they are typically PhDs with the expertise in their subject area.
There are some faculty who have both PharmD and PhD but I would say it is rather unusual. It doesn't really affect the salary all that much, or improve chances of getting a particular position in most cases. I would only recommend getting a PhD on top of PharmD for people who have a strong interest in a particular area and what to have more research expertise. But again, there is plenty of research which is being done by PharmDs, not just clinical but also laboratory.
