What antibiotics can and can't do
Antibiotics work against bacteria. They don't help viral infections such as colds, most sore throats and influenza — and taking them anyway can cause side effects without any benefit.
Do's and don'ts
- Take an antibiotic only when it has been prescribed for your current illness.
- Follow the prescribed dose and duration; ask the prescriber before changing or stopping it.
- Don't share antibiotics, and don't keep leftovers for a later illness.
- Tell your clinician about allergies and any side effects.
Why it matters for everyone
Every unnecessary course helps bacteria become resistant, so antibiotics stop working when people really need them. See antimicrobial resistance.
Sources
- Healthy Habits: Antibiotic Do's and Don'ts — U.S. Centers for Disease Control and Prevention. Checked 2026-07-13; source updated 2025-09-23.
- Antibiotics — MedlinePlus — U.S. National Library of Medicine. Checked 2026-09-26.
Editorial update: 2026-09-26.
Medical disclaimer: this is a source-linked educational summary, not individual medical advice, diagnosis, prescription or interpretation of personal results. For severe or rapidly worsening symptoms, call 115.
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