A giant retailer will be using its clout to push down generic drug prices in Florida.

Wal-Mart Stores Inc., Bentonville, Ark., said it will be starting a generic drug discount program by offering a 30-day supply of 291 generic drugs for $4 per prescription.

Wal-Mart will start by offering the program for in-store customers only at 65 company pharmacies in the Tampa Bay, Fla., area, the company says.

The program will expand to include all Wal-Mart stores in Florida in January 2007, the company says.

The program includes the company’s Neighborhood Market and Sam’s Club pharmacies as well as Wal-Mart pharmacies.

“Wal-Mart intends to take the program to as many states as possible next year,” the company says.

Pharmacies at Wal-Mart stores and sister stores will accept insurance payments for the $4 generic drugs, and they also will offer the program to the uninsured and other customers who pay for drugs out of pocket, Wal-Mart says.

The medicines included will include drugs used to treat allergies, cholesterol, high blood pressure and diabetes, Wal-Mart says.

The program also will include some antibiotics, antidepressants, antipsychotics and prescription vitamins, the company says.