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What is the recommended antibiotic treatment for scarlet fever, and how long

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MSt MRCGP.

Posted: 16 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed

Recommended antibiotic treatment for scarlet fever: The first-line antibiotic is phenoxymethylpenicillin (penicillin V).

Duration of administration: A 10-day course is recommended.

Alternatives for penicillin allergy: For birth to 6 months, clarithromycin for 10 days; for non-pregnant adults and children aged 6 months to 17 years, azithromycin for 5 days or clarithromycin for 10 days; for pregnant or postpartum women (within 28 days of childbirth), erythromycin for 10 days.

Educational content only. Always verify information and use clinical judgement.

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