If you’ve filled a prescription recently, you know how expensive medications can be. Some can cost hundreds or even thousands of dollars, leaving many people unable to afford their medicines. A GoodRX survey found that one-third of Americans had skipped filling a necessary prescription due to cost.

It’s easy to understand why. Prescription drug prices have skyrocketed over the past few years. According to AARP, in just seven years, the average cost of prescriptions more than doubled.