Children's paracetamol is a cold medicine and cephalosporin is an antibiotic. There is not much conflict between the two, so you can eat them. However, the child's fever of 37.8℃ is only a low-grade fever, and there is no other evidence to prove that it is caused by bacterial infection. It is generally not recommended to give antibiotics to children casually, which may easily lead to antibiotic abuse.