The student in custody admitted to selling some of the brownies on campus last week and several more on Monday, according to a post on the Volusia County Sheriff's Office Facebook page.
In addition to the students admitted to hospitals, several other students were taken home by parents or guardians.
"One of the students was so impaired on Monday that he could barely speak," the Facebook post read.
The accused student "was given a court date and released to his parents at the direction of the Florida Department of Juvenile Justice," the post read.