Why does my child need to finish their antibiotic?

Partial treatment: If you don't complete a course of antibiotics, you may leave some infection that is partially treated. This is the number one cause of antibiotic resistance. Furthermore, if you fail to complete treatment for strep throat, you risk developing late complications of strep. These include damage to joints, kidneys and lungs, among other things.

Several reasons: Antibiotics must be taken to fruition to make sure the infection doesn't return. Also to prevent future reactions or prevent hypersensitivity to the antibiotic in the future. Always follow your doctors prescription order even if you are feeling better before completing the full dose.