Doctors do not go back to school each time a new drug comes out to learn all about the new drug. Pharmacists (druggists) are the only ones who do regularly go back to school to be brought up to date on medications. Doctors receive pamphlets(From the drug companies that are pushing the drugs), and may read carefully the inserts to the new drugs. If a doctor returns to school it is for the practice of medicine, not on the drug part of medicine. Medicine as a field is highly specialized due to the huge amounts of data we humans now possess. While its true 50, 60 100 years ago a doctor would know nearly everything known about medicine, there was so little to know that one person could learn it all. How medicine is practiced is also based on the limitations of one human beings knowledge. When it comes to drug prescribing a doctor usually knows a few drugs to hand out to treat the illness - s/he mayn't know all of the potential drugs to use, and most likely is unaware of all potential side effects of all the drugs they hand out. Unless you doctor specialized in depression only, s/he may also have to know several heart medications, diabetes medications, antibiotics, antivirals, anxiety medications, HIV therapies, thyroid, spleen, lung, and other organ medications and a whole lot more. This is why when you go to the pharmacy to pick up the drug you get a pharmacological consult where the pharmacist tells you all the potential problems and hands you several sheets of paper with warnings, and known side effects and with sections of warning signs to go back to your doctor or go to ER if __________ takes place. Pharmacists have specialized in drugs, drug interactions and are constantly learning about the newer drugs - they also have a huge computer data base of interactions, and if you go to only one drug store they will know all the medications you are on and their system is designed to flag a warning when conflicting medications or potential harmful drug mixtures exist. It is highly possible that your doctor has reached his/her full capacity of storage room for data on medicine/drugs, and it is not an oversight or a blind spot, just a problem of too much data to process.

Doctors have a god complex. No one is allowed to be smarter than them in their world.