Shanon and William Schmidtknecht, of Poynette, say their 22-year-old son Cole was told the cost had jumped from $66 to $539 out-of-pocket. He tried to manage his condition with his rescue inhaler but suffered a fatal asthma attack days later.

A Wisconsin couple has filed a lawsuit against Minnesota-based Optum Rx and Walgreens for their son’s asthma-related death one year ago.

Cole Schmidtknecht, of Wisconsin, USA, struggled to breathe after a severe asthma attack and became asphyxiated after choosing between paying rent or for an inhaler