In 2019, Sanofi created the Insulin Valyou Savings Program, which charged patients $99 a month for insulin, regardless of income. In 2021, Novo Nordisk created a similar program called My$99Insulin.

Also that year, Novo Nordisk collaborated with Walmart to sell private-label analog insulin at a deep discount. Walmart said its ReliOn NovoLog vials and FlexPens save customers 58% to 75% off the cash price for branded insulin.

For Eli Lilly insulin, the new price cap will automatically apply at most pharmacies with no additional action from the patient. Otherwise, a coupon will be available for patients to use at the remaining 15% of pharmacies where the electronic system does not allow for the automatic price drop, Ricks said.