Pharmacy Nursing?

It's not clear to me what you mean by "concentrate in pharmacy." I'm not aware of any nurse role that "concentrates in pharmacy" -- pharmacists do that. You could always "jump the fence" and go to pharmacy school, if you would be happier doing that than practicing nursing. It's a great field, I hear.

What is it that you want to do with a Master's (what kind of job or role)? That might help people come up with more helpful responses (than mine).

What aspect of pharmacy you're interested in? Are you interested in the "pharmacy practice" or "the knowledge of pharmacology"?

I don't believe there is MSN in pharmacology but there is a pharmacology course in every NP program.

Pharmacy school is interesting but you have to like to practice pharmacy.