Antibiotics are medicines that have specific mechanism of actions towards bacteria. They are decided into classes based on mechanisms.
They are good as they have saved millions or even hundred of millions of lives. Small things that would mean death: infected wounds, abscesses, UTI, pneumonia are now treatable even as outpatient.
They are bad in their side effects, which are specific for each med. Some may increase risk of other infections. The other people born with antibiotics is that excessive use has caused (worsening) resistance.
One major thing: antibiotics have no effect on virus, protozoan, or fungi.
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