Walgreens will close 1,200 stores over the next three years. Rite Aid filed for bankruptcy last year, and CVS is closing hundreds of stores.

The walkout, called “pharmageddon” on social media, included pharmacists at CVS and Walgreens.

Corporate mergers and competition from supermarkets, discount clubs and online startups — among other forces — have altered how pharmacies need to do business.

At the same time, the retailer’s scaling back its in-store clinics.

CVS wants to be known for improving health, so it's making subtle changes.

Rite Aid is trying to fill more than the medicine aisles this season.