The $4 list refers to approximately 80 generic prescription drugs available for $4 per 30-day supply at Wal-Mart, Target, Kmart, Walgreens and Kroger. In addition to the $4 price for a 30-day supply, the drugs can usually be ordered with $10 for a 90-day supply.
Prescription drug spending in the United States averages more than $1,000 per person, and the $4 list offers significant cost savings as a result. Wal-Mart was the first company to offer $4 prescriptions, and it lists available drugs for 20 disease categories on Walmart.com. Target also lists available drugs by disease category. Kroger.com features an alphabetical list of $4 prescription drugs on its website.