Cameron Kasky was only 17 when a shooter killed 17 people at his school, Marjory Stoneman Douglas High School in Parkland, Florida, in February 2018.

In the aftermath of the shooting, Kasky said he struggled to take care of himself. Even while he and a few of his fellow students were planning the March for Our Lives rally in Washington, D.C., Kasky could not sleep, and he began using his prescriptions in irresponsible ways.