You should likewise see a General Practitioner if you have signs and symptoms of a UTI that have not improved after a couple of days or if you have blood in your pee. Your antibiotic might require to be transformed after the very first day or more of treatment if lab tests of the germs in your urine reveal a various antibiotic will work better. If this is the situation, your health care company will certainly tell you. Generally you will need to take an antibiotic for at the very least 7 days.