DD has had high temperature since Friday. When I rang out of hours Dr they said it was probably a virus and to keep an eye on her. Her temp got worse today and was 40.1. The Out of Hours GP seen her today and said her glands were swollen and she had signs of throat infection. He gave her antibiotics. How long does it take for them to work. Her temp is at 39.6 now and she isn't due any more medicine until about 9pm.