Jennifer Buth thought being a pharmacist would be a challenging, well-paid, respected profession that would let her help people safely manage pain and illness. She also quickly learned the dark side of the job. Shortly after returning to Wisconsin from Florida with a doctorate in pharmacy, Buth was robbed twice in a month. When Walgreens wouldn't transfer her to a different store, she quit. She found work at a Sam's Club pharmacy, then was recruited to PharMerica's Pewaukee operation, where the national firm filled prescriptions for institutions such as nursing homes. As the managing pharmacist, she earned six figures and...