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MEDICATION SAFETY

Doxycycline safety summary

  • INN
  • doxycycline
  • tetracycline antibiotic
  • 100 mg oral capsules, 7-day course

Doxycycline is a tetracycline antibiotic and the standard 7-day treatment for chlamydia. Taken correctly — sitting upright with a full glass of water, and with sun protection — it avoids its two classic problems: throat irritation and sunburn-like reactions.

Bacterial infections, including genital chlamydia (usually 100 mg twice a day for 7 days).

  • Swallow each capsule with a full glass of water, sitting or standing upright, and stay upright for at least 30 minutes.
  • Take with food or milk to reduce nausea.
  • Complete the full 7 days even if symptoms disappear earlier.
  • Avoid sex until you have finished the course and any partner has been treated.

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

  • Pain on swallowing or burning chest pain — the capsule can irritate or ulcerate the oesophagus if it sticks.
  • Severe headache with blurred or double vision — a sign of raised pressure around the brain.
  • Severe skin reactions, blistering, or an intense sunburn-like reaction.
  • Severe or bloody diarrhoea.
  • Severe allergic reaction — rash, swelling, difficulty breathing.

WHEN TO CALL THE DOCTOR

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

  • Pain or burning when swallowing.
  • Severe headache or any change in vision.
  • A blistering or severe sunburn-like skin reaction.
  • Symptoms still present after finishing the 7-day course.

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 — Doxycycline 100 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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