CVS Pharmacy must count on prescription drug sales to stay in business, but Wal-Mart doesn't have to add a tremendous markup to the prescription drugs they sell. The local temperature with the medicine producing country is one as well as the other country might be another, as well as the avian temperature could be the other. Most drugs need to get stored at exact temperatures, so one of the things pharmacists learn included in pharmaceutical quality training could be the necessary steps to keep the facilities clean and in compliance with regulations.