question: My Daughter nearly aged 3 has a chest infection. She has High temperatures for 5 nights now as high as 40.2.  Doctor has changed her anti biotic from Distaclor to Klacid.  At night time temperatures are the worse and during the day there low grade but she gets very tired on running around.  She has a corrected Congenital heart disease TGA which was repaired at birth.  Not sure if she needs IV Antibiotics - she is only on the klacid since today.