Doctors are typically not experts in medications. Specialists probably know a lot about medications pertaining to their specialty, but asking GPs to know so much about a vast array of diseases AND the medications to treat them all, AND all interactions between medications is unreasonable. Doctors education is primarily in diagnosing disease. Pharmacists go to school just as long as doctors do (I think the major difference is pharmacists don’t typically do a residency after they graduate unless they are not planning to work in a community pharmacy), but their entire education is based around medications. Pharmacists are the medication experts. It’s a good thing that we have both looking after the healthcare of patients.