Fortunately, the treatment for UTI's is relatively straightforward ' a liquid antibiotic, like amoxicillin, for simple infections without fever. However, if there is a fever, your child will likely require a few days of hospitalization for IV antibiotics. Remember that if your doctor does prescribe an antibiotic that your baby needs to take the full course, all the doses the doctor prescribes, even if she seems to be feeling better. UTIs are common in babies, and it's important to identify them early so that they can be treated effectively. If you are concerned that your baby might have one, call your pediatrician immediately!