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Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Antibiotics

Antibiotics are medicines used to kill bacteria that cause infections.

A doctor will choose an antibiotic to treat an illness based on:

  • Whether taking an antibiotic will reduce the length or severity of the illness.
  • Whether the person is allergic to any antibiotics.
  • How likely it is that a certain antibiotic will kill the bacteria believed to be causing the symptoms.
  • The symptoms and the severity of the illness.
  • Other medical problems that the person has.
  • The person's age. (For example, some antibiotics are not safe for children.)
  • Whether a woman is pregnant.