Azithromycin 500mg

Buy Azithromycin for Chlamydia

A 3-day course of Azithromycin is an alternative treatment for uncomplicated chlamydia and good for patients who are unable to take doxycycline.

All our products are genuine UK medicines and are dispensed by our partner pharmacy based in the UK.

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  • 3-day treatment course
  • Alternative treatment recommended by BASHH only when doxycycline is not suitable
  • Not suitable for patients who are allergic to Azithromycin or other macrolide antibiotics incl. erythromycin and clarithromycin
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Azithromycin belongs to a group of medicines called macrolide antibiotics and contains the active ingredient azithromycin dihydrate. Antibiotics are used to treat infections caused by micro-organisms like bacteria. Azithromycin is used for the treatment of certain infections caused by bacteria that are sensitive to it, including the sexually transmitted infection Chlamydia.


Azithromycin is not suitable if you are allergic to azithromycin dihydrate or any other macrolide antibiotic such as erythromycin or clarithromycin or to any of the other ingredients of this medicine listed in the patient information leaflet.

Pregnancy and Breastfeeding

If you are pregnant or breastfeeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. You should not use Azithromycin during pregnancy, unless explicitly advised by your doctor. Azithromycin should not be used if you are breastfeeding.

Important Interactions

You must tell your doctor if you are taking, have recently taken or might take other medicines, in particular:

  • antacids - used for heartburn and indigestion
  • ergotamine - used for migraine, should not be taken at the same time as serious side effects may develop (with numbness or tingling sensations in the limbs, muscle cramps, headaches, convulsions, abdominal or chest pain)
  • warfarin or similar medicines - used to thin the blood, as Azithromycin can thin the blood even more
  • terfenadine - used to treat hay fever or skin allergy, should not be taken at the same time as this may cause severe heart problems (shown on an ECG)
  • quinidine - used to treat heart rhythm problems
  • digoxin - used to treat cardiac impairment, as Azithromycin can make the effects of this stronger
Recommended Dosage

3-day course: 1g orally as a single dose, followed by 500mg once daily for two days

Side Effects
  • abdominal pain
  • feeling sick (nausea)
  • vomiting
  • wind (flatulence)
  • diarrhoea
  • lack of appetite (anorexia)
  • feeling dizzy
  • headache
  • skin reactions

Get urgent medical help if you experience any of the following:

  • swelling of the face, lips, tongue, throat, hands, feet or genitals
  • blistering of the skin, mouth, eyes and genitals
Please Note

All medication can cause side effects. We have only listed a few to be aware of. Details of all side effects, including rare side effects to be aware of, are listed in the patient information leaflet (PIL). When completing your medical questionnaire, it is very important that you answer the questions truthfully. This is to ensure your doctor has a full picture of your medical history before prescribing. List all medicines you are already taking, including non-prescription and herbal medicines.


Erythromycin or ofloxacin are alternatives for patients not suitable for first line (doxycycline) or second line (azithromycin) treatments.

Looking after your medicine

Do not take medicines after the expiry date stamped on the pack. Keep all medicines out of the reach and sight of children.

Medicines are only intended to be used by the person they are prescribed for. Do not give your prescribed medicine to anybody else, even if they have the same symptoms as you. Medicines can be harmful if used by anybody other than the person they have been prescribed for.

References Azithromycin 500mg Patient Information Leaflet
British National Formulary: azithromycin

Due to growing antibiotic resistance, a single 1g dose of Azithromycin is no longer recommended for chlamydia and many other sexually transmitted infections. However, if the first line treatment doxycycline is not suitable, then a longer 3-day course of Azithromycin (second line treatment) is available.

I will take 7 days for Azithromycin to treat and cure your chlamydia infection. You should therefore avoid sex without a condom until 7 days after you complete your treatment. This is very important even if you do not have symptoms, as you can still pass the infection on.

If you have been diagnosed with a sexually transmitted infection like Chlamydia, it is always important to tell your sexual partner(s) so that they can also get treated. Which treatment is best for them will depend on their own medical and treatment history. You must not order medicine on their behalf. Each patient must seek medical advice separately.

Whilst drinking moderate amounts of alcohol whilst being treated with Azithromycin isn’t thought to reduce the effectiveness of this antibiotic, it may increase side effects.

As Azithromycin is usually taken once a day, you should try to take your medicine at the same time each day. This will help you to remember to take your medicine and will also ensure your doses are evenly spaced out.

Last reviewed & updated  14/07/2019   Authored  18/09/2009

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