In an address to the Council of Teaching Hospitals in New Orleans, Wal-Mart's senior vice president and president of health and wellness, Dr. John Agwunobi will confirm a major milestone for the company's $4 prescription program. Since its launch in September 2006, the program walmart.com/pharmacy has now saved Americans more than $1 billion ($1,032,573,012.61 as of March 10, 2008).