A pharmacist speaks with a customer at Walmart Neighborhood Market in Bentonville, Ark., in 2014. On Monday Walmart introduced a new set of guidelines for dispensing opioid medications.
CVS Health has struck a deal to buy Aetna, the insurance giant. The combined companies would have more clout with drugmakers and would aim to bring more health care to consumers in retail clinics.
Gene J. Puskar/AP
A customer makes a purchase using Apple Pay on her iPhone 6 at a Walgreens store in Times Square last Monday. The mobile payment service has now been blocked by CVS and Rite Aid.
John Minchillo/AP Images for MasterCard