Pharmacy = You get a 6 year professional doctorate degree (PharmD), get licensed practice as a practitioner of pharmacy, work in retail, hospital, ambulatory stuff, crap like that (more than likely involving patients).
Pharmacology = a "real" doctorate (PhD), you have to go to grad school AFTER a prior degree, like 8+ years, no real licensure stuff to worry about, work in academia, a lab somewhere, industry, stuff liek that (more than likely not involving patients) - if you want to get into drug discovery, this is your path. (or med chem)