How do free prescription discount cards work? When people join together to purchase in large quantities, everyone saves! Discount Drug Network, provider of the Prescription Discount Card, covers millions of people and leverages the power of group purchasing to negotiate these discounts on behalf of our members. Just call or go online for help looking up drug pricing at your local pharmacy. The pricing tool on our website is incredibly easy to use and helps you price compare the prescription you need at all local participating pharmacies.