← Ask your own question

Do children really need to finish a course of antibiotics?

The old rule of always finishing every antibiotic course is being updated. For many common childhood infections, shorter courses work just as well as longer ones, but a few infections (like ear infections in kids under 2) still need the full length. Parents should follow whatever duration their child's doctor prescribes, not stop early on their own.

Guidelines are shifting toward the shortest effective course rather than automatically the longest, based on strong trial evidence.

Strength of evidence

Strong

Supported by multiple randomized controlled trials and meta-analyses (including an AAP-published meta-analysis and NICE evidence review) directly comparing shorter versus longer antibiotic durations in children.

What the evidence says

For a long time, parents were told to always finish every antibiotic prescription, even after a child felt better, to prevent resistance. Newer research has actually flipped part of this advice: for many infections, shorter courses work just as well as longer ones and may cause fewer side effects.

For example, a large meta-analysis of 16 trials in over 12,000 children found that shorter antibiotic courses (5 days or less) for community-acquired pneumonia worked about as well as longer courses. Similar shorter-course evidence exists for strep throat and urinary tract infections. The World Health Organization notes that evidence is emerging that shorter courses of antibiotics may be just as effective as longer courses for some infections, and that stopping early does not automatically cause resistance the way many people assume.

However, this is not true for every infection. In children younger than 2 with ear infections (acute otitis media), research shows a 5-day course of antibiotics is less effective than a 10-day course, so the full length still matters there.

Bottom line for parents: don't assume you can always stop early, and don't assume you always must finish 10 days either. The right duration depends on the specific infection and your child's age. The safest approach is to take antibiotics exactly as your pediatrician prescribes and call them if you have questions about stopping early, rather than making that call yourself.

Sources

✓Reviewed by CH, MD, FRCPC

Reviewed by a specialist physician certified by the Royal College of Physicians and Surgeons of Canada, who has read this answer against the sources listed above and confirmed it reflects them. That is not medical advice about your child. How we review

Answer checked July 25, 2026

Educational information only. Not medical advice, not a diagnosis, and no doctor-patient relationship is created by using this. Founded Parent has not examined your child and does not know their history, so this may not apply to you. In an emergency, call your local emergency number. What Founded Parent cannot do

Report a problem with this answer

Related questions

Have a different question? Founded Parent searches published paediatric guidelines and peer-reviewed research, then tells you how strong the evidence actually is.

Ask a question

Educational information only. Not medical advice, not a diagnosis, and no doctor-patient relationship is created by using this. Founded Parent has not examined your child and does not know their history, so its answers may not apply to you. Never delay or disregard advice from a qualified health professional because of something you read here. In an emergency, call your local emergency number.