The Amazonian municipality of Caracaraí has 22,000 inhabitants and an overworked pharmacist named Samuel Andrade. Andrade arrives at work at 8 a.m. to handle hundreds of prescriptions from free government clinics. Most days, he can’t get through all of them. He sometimes gets stuck for hours cross-checking drug databases to ensure nothing has been prescribed incorrectly by rural doctors. It is stressful work. He has to help the dozens of patients who line up at his dispensary every day, some of ...