Police and school officials in Riley County are cautioning parents about potential dangers from over-the-counter medicines after four Manhattan High School students got sick on cold remedies.

WIBW-TV reports that two 15-year-olds and two 16-year-olds needed treatment Tuesday for what authorities called accidental overdoses of the cold medications. Riley County police say the four were trying to get high but instead became ill from the mixture of drugs.

Officials would not identify the students or the medicines they ingested. One student was taken by paramedics to a regional health center. The other three were taken by their parents to various locations for treatment.

A spokeswoman for the Manhattan-Ogden school district said the four weren’t in school Wednesday.