Wal-Mart Stores says it is expanding its discounted prescription drug program.
It will offer 90-day supplies for $10 and add several women's medications at a discount. It also says it will lower the price of more than 1,000 over-the-counter drugs.

The move marks the third phase of a company program that began in 2006 to provide a 30-day supply of generic prescription drugs for $4. Wal-Mart said the program has saved customers more than $1 billion.

The company began filling prescriptions Monday for up to 350 generic medications at $10 for a 90-day supply at Wal-Mart, Neighborhood Market and Sam's Club pharmacies in the U.S.

Wal-Mart said it will add several women's medications to its list of prescriptions available for $9, including drugs to treat breast cancer and hormone deficiency.