Sticker Shock in the Pharmacy

When Caiti Derenze, a lawyer in Jersey City, N.J., went to Walgreens to refill her insulin prescription in July, she was met with a nearly $300 bill. “I was like, ‘Oh my God, I only paid like $50 last month. What happened?’” Ms. Derenze said. “It feels like a punch in the gut, to be…