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MEDICATION SAFETY

Azithromycin safety summary

  • INN
  • azithromycin
  • macrolide antibiotic
  • 500 mg oral tablets, single dose or short course

Azithromycin is a macrolide antibiotic used to treat chlamydia and other bacterial infections. It concentrates inside tissue and keeps working for several days after the last tablet, which is why a chlamydia course can be as short as a single dose.

Bacterial infections, including uncomplicated genital chlamydia.

  • Take exactly as prescribed — for chlamydia this is often a single dose taken at once.
  • Can be taken with or without food; food can ease a sensitive stomach.
  • Avoid sex (including with condoms) for 7 days after a single-dose treatment, and until any partner has also been treated.
  • Complete the full prescription even if symptoms settle early.

Rare, but stop the medicine and get help the same day.

  • Severe allergic reaction — rash, swelling of the face or throat, difficulty breathing.
  • Severe skin reactions with blistering or peeling.
  • Palpitations, a racing or irregular heartbeat, or fainting — azithromycin can prolong the heart's QT interval, especially alongside other medicines that do the same.
  • Yellowing of the skin or eyes, dark urine (liver problems).
  • Severe, watery or bloody diarrhoea — even weeks after finishing — can signal a C. difficile gut infection.

WHEN TO CALL THE DOCTOR

Call us through the in-app chat if you notice…

  • Rash, facial swelling or trouble breathing — call emergency services first.
  • Palpitations, an irregular heartbeat or a fainting episode.
  • Severe or bloody diarrhoea, during treatment or in the weeks after.
  • Symptoms that have not improved a week after treatment.

OFFICIAL SOURCE

This summary is condensed from the regulator's full product leaflet for ease of reading. The complete document — every interaction, dose adjustment and reporting note — is one click away.

AEMPS CIMA — Azithromycin 500 mg

This page summarises information from the regulator-approved leaflet for reference only. It is not medical advice and does not replace the assessment of an EU-licensed doctor. Your doctor will review your individual history, dose and interactions during your consultation.

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