Alexis Bortell, along with her father and other plaintiffs, including former NFL player Marvin Washington, filed suit in the Southern District of New York against the attorney general as well as the Department of Justice and the Drug Enforcement Agency.
Many states now allow use of marijuana for at least some medical reasons. The lawsuit filed in July seeks to make medical marijuana legal across the U.S.
"This lawsuit stands to benefit tens of millions of Americans who require, but are unable to safely obtain, Cannabis for the treatment of their illnesses, diseases and medical conditions," the suit states.
Alexis, whose family moved to Colorado from Texas to take advantage of the state’s legalization of recreational and medical marijuana, had been suffering since she was 7 from a form of epilepsy that cannot be safely controlled with FDA-approved treatments and procedures, the lawsuit says.
As a result, she often had multiple seizures a day. "Nothing she tried worked," the suit states. When her family finally tried a form of marijuana, the girl found "immediate relief from her seizures."
"Since being on whole-plant medical Cannabis, Alexis has gone more than two years seizure-free," the suit says.
The suit contends that Alexis won’t be able to return to her native Texas where she hopes to attend college because she would be subject to arrest if she continued to use marijuana to control her seizures.
ABC News reached out to the Justice Department for comment on the lawsuit but did not get an immediate response.