In this situation I would give ibuprofen as well as the panadol (the two are safe taken together). Usually I would give panadol, then ibuprofen 2 or 3 hours later, then panadol after another couple of hours, etc etc.

Also cool baths, a fan in her room, lots of cool liquids, a cold cloth on her body, etc etc. I know this is scary but if it is any consolation my boytwin gets this often and it always resolves after a day or two.