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Azithromycin is a macrolide antibiotic used for selected susceptible infections. For uncomplicated chlamydia it is usually an alternative when the preferred doxycycline regimen is unsuitable — never a first choice by default.

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What is azithromycin?

Azithromycin comes as a tablet or oral suspension, given as a short prescribed course. The indication, regimen and follow-up depend on your history and country guidance, and a licensed doctor decides whether it is appropriate — prescribing is never automatic.
Active ingredient: azithromycin. Dosage is diagnosis-specific, set by the reviewing doctor after confirming the diagnosis.

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How it works

Azithromycin binds to bacterial ribosomes and interrupts protein production, which stops susceptible bacteria from growing.

Alternative when appropriate

A clinician can consider it when the preferred chlamydia regimen does not fit the patient.

Diagnosis-led prescribing

The infection, test result and local resistance guidance determine whether it is suitable.

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Dosing

For uncomplicated urethral or cervical chlamydia, an authorised regimen is 1,000 mg as a single dose, but current local guidance often reserves azithromycin for situations where the preferred doxycycline course is unsuitable. The doctor gives the exact course after confirming the diagnosis; the regimen is not something to choose or repeat yourself. If a dose is not fully absorbed — for example if you vomit soon after taking it — contact the service rather than taking another dose automatically.

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Follow-up

Follow-up is included in the plan: it covers partner notification, avoiding sexual contact for the interval the service advises, and repeat testing where indicated. Retesting or a test of cure is scheduled only when clinically indicated and at the right interval.

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What has been reported

Keep hydrated, and seek advice if symptoms prevent a dose from being retained.

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Who it is not suitable for

  • A significant heart rhythm disorder, or a previous reaction to a macrolide antibiotic
  • An infection that local guidance says needs a different antibiotic
For severe, sudden or unexpected symptoms — palpitations, fainting, chest symptoms, yellow skin or eyes, dark urine, or a severe allergic or skin reaction — call your local emergency number or go to the nearest emergency department, then let your doctor know through your account chat.

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How Hi-Doctor handles it

1

Confirm diagnosis and interactions

The consultation reviews your test result, rhythm history and current medicines before treatment is considered.
2

Take exactly as prescribed

Complete every prescribed dose of the course the doctor sets.
3

Follow partner and repeat-testing advice

The plan covers partner notification, sexual contact timing and repeat testing where indicated.
For the day-to-day mechanics of a prescribed course — antacid timing, what to do about a missed or vomited dose, and storage — see the azithromycin chlamydia guide. Related: doxycycline, the antibiotic usually preferred first for uncomplicated chlamydia. See also how a Hi-Doctor consultation works, safety and eligibility checks, and pricing.

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Start a consultation

Sexual health consultation

Answer the sexual health questionnaire and a registered doctor reviews it. They decide whether treatment is appropriate, which one, and at what dose — and declining is a normal outcome. See what it costs and how the review works.
This page is reference information, not medical advice and not a prescription. Whether a medicine is appropriate for you is decided by a registered doctor after reviewing your consultation.