36.5 to 37.5 degrees. If I have time I'll post some more information about panadol, but in essence - panadol is for pain, not fever. If your child ha a fever high enough to need panadol - ie. 40 degrees or above - then they probably need to see a doctor or go to hospital anyway. Otherwise, it is best to save it for when they are grizzly/achy or obviously in pain.