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Zithromax

  • Antibiotic for the treatment of chlamydia
  • Single-dose or short-course azithromycin capsules
  • Clinically proven macrolide antibiotic
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Fast & Free Delivery Options

Variety of delivery options including next day & free delivery.

100% UK-based Pharmacy

Pharmacy, clinic and prescribers based in Greater Manchester.

Free Online Consultations

Start your treatment with a quick and free online consultation.

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About Zithromax

Zithromax  contain azithromycin 250 mg, a macrolide antibiotic used to treat a range of bacterial infections, including sexually transmitted infections such as chlamydia. Azithromycin works by stopping the growth of bacteria, allowing the body to clear the infection effectively.

Zithromax is commonly prescribed as a single-dose or short-course antibiotic treatment, making it a convenient and reliable option when taken exactly as directed by a healthcare professional.

Zithromax Capsules are suitable for adults and adolescents weighing over 45 kg and are supplied in blister packs:

  • Zithromax 250 mg – 4 capsules
Medication Name Zithromax
Active Ingredient Azithromycin 250 mg per capsule
Other Ingredients Lactose anhydrous, maize starch, magnesium stearate, sodium lauryl sulfate, gelatin, iron oxide (E172), shellac, propylene glycol, sulfur dioxide, titanium dioxide
Medication Form Oral hard capsules
Used to Treat Chlamydia and other bacterial infections
Available Sizes 4-capsule blister packs
Who Can Use It Adults and adolescents over 45 kg
Prescription Required? Yes – Prescription Only Medicine (POM)
Patient Information Leaflet Zithromax Capsules – Patient Information Leaflet

What Is Zithromax Used For?

Zithromax is used to treat bacterial infections caused by susceptible organisms. Within sexual health services, it is widely prescribed for the treatment of chlamydia (Chlamydia trachomatis). It may also be used for chest, throat, ear, skin, and soft tissue infections when clinically appropriate.

Who Is Zithromax Suitable For?

Zithromax Capsules are suitable for adults and adolescents weighing more than 45 kg.

Do not take Zithromax if you:

  • Are allergic to azithromycin or other macrolide antibiotics
  • Are allergic to any of the listed ingredients

Speak to a healthcare professional before taking Zithromax if you:

  • Have liver or kidney problems
  • Have heart rhythm problems or a history of QT prolongation
  • Have low potassium or magnesium levels
  • Have myasthenia gravis
  • Are taking medicines such as warfarin, digoxin, ciclosporin, or antacids

How to Take Zithromax

  1. Take the capsules exactly as prescribed.
  2. Swallow capsules whole with water.
  3. Take on an empty stomach – 1 hour before or 2 hours after food.
  4. Complete the full course, even if symptoms improve.

Do not take a double dose to make up for a missed dose.

Possible Side Effects of Zithromax

Common side effects:

  • Diarrhoea
  • Nausea or vomiting
  • Stomach pain
  • Flatulence

Uncommon:

  • Headache or dizziness
  • Rash or itching
  • Taste disturbances

Rare but serious side effects include severe allergic reactions, serious skin reactions, liver problems, or heart rhythm disturbances. Seek medical help immediately if these occur.

Warnings and Precautions

  • Do not share this medicine with others.
  • Tell your doctor if severe diarrhoea develops during or after treatment.
  • Contains lactose and sulfur dioxide, which may cause reactions in sensitive individuals.

Storage Instructions

  • Store at room temperature.
  • Keep out of sight and reach of children.
  • Do not use after the expiry date.

Zithromax Reviews

Our Experienced UK-based Pharmacy Team

Clinical Consultant
MUDr, MRCEM, EBCEM, FRCEM
GMC no. 7176414

Pharmacist
MPharm
GPhC no. 2065469

Pharmacist
MPharm
GPhC no. 2046514

Page content authored by Amjad Khan, last reviewed by Mr Muhammad on 13th April 2026.

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