Walmart has already introduced the nationwide, same-day pharmacy delivery in six states: Arkansas, Missouri, New York, Nevada, South Carolina, and Wisconsin. Walmart plans to make the service available to customers in 49 states by 2025.

The new service is already available in six states, and gives the supermarket giant a leg up against struggling drugstores like CVS and Walgreens.

Walmart, already partially responsible for the slow demise of America’s drug stores, is launching yet another CVS killer: 30-minute prescription delivery. Walmart’s pitch to customers is simple – fill your prescription,

Walmart said it is planning to offer same-day pharmacy delivery services in an effort to make filling or refilling prescriptions more convenient for its customers.

Walmart has begun a pilot program that delivers to people's doors prescription drugs and other items they order and pay for online.