Ay, here’s the rub. You’re not a medical doctor, but you have to go to school like one. In addition to obtaining your bachelor’s, you’ll need to earn your Pharm.D. (something like a Ph.D. but with more lower-case letters) from an accredited school of pharmacy. To even get into such a program in the first place, you will have needed to complete 2 years of specific professional study - something in the math and sciences. The Pharm.D. program should take 4 years to complete, after which you may (if you so choose) get even further training in a residency program or fellowship. By the end of all that schooling, you should finally be able to move a pill from one bottle to another.