OMAHA, Neb. (AP) — The University of Nebraska’s medical school is seeking 25 people for a study of a medication derived from marijuana.

The University of Nebraska Medical Center in Omaha says the study will investigate the use of cannabidiol in patients with drug-resistant epilepsy who also will take anti-epileptic drugs.

Cannabidiol is extracted from the marijuana plant — Cannabis sativa — and is distinct from the component that makes people high. The study medication is called Epidiolex. It’s described as a plant-based pharmaceutical formulation of pure cannabidiol and contains only trace amounts of the psychoactive component.

The study is authorized under a legislative bill approved in 2015.