My Granddaughter Fell At Cheer Practice, And Now Has A

My Granddaughter fell at Cheer Practice, and now has a Concussion. The ER Doctor recommended Tylenol for her pain. But, she seems to have a reaction when she takes it. Can, Tylenol make you talk and act a little funny, saying things that don't make sense ? Crying, then Laughing for no reason ? Not sure what to do, until we can take her to her Dr on Monday ?