Can antibiotics treat viral infections?
Why antibiotics do not treat viruses, when they may be appropriate, and how to use them safely when prescribed.
General information only. This guide does not diagnose a condition or replace a consultation. This service is not for life-threatening emergencies. Call the appropriate local emergency service or go to the nearest hospital immediately.
Antibiotics work against bacteria, not viruses
Antibiotics do not treat viral infections such as colds or influenza. Taking an antibiotic when it is not needed will not make a viral illness clear faster and can still cause side effects.
A clinician decides whether antibiotics are appropriate
Similar symptoms can have different causes. A clinician may use the history, examination, tests, and the likelihood of bacterial infection before prescribing. Do not use leftover antibiotics or another person's prescription.
Use a prescribed antibiotic exactly as directed
Follow the dose, timing, and duration on the prescription. Ask a doctor or pharmacist if instructions are unclear or if a reaction develops. Seek urgent help for severe breathing difficulty, facial swelling, collapse, or another severe reaction.
References
These links were checked during the editorial evidence review.
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