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Zithromax is an antibiotic used to treat chlamydia and other bacterial infections. It is a branded medication and contains the active ingredient azithromycin, which is the first line treatment for chlamydia.

Zithromax is prescription medication and you cannot buy it over the counter.

Superdrug online doctor provides a safe and easy online consultation for chlamydia. To place an order, fill in our brief medical questionnaire. Our doctor will review your order and approve appropriate treatment.

We prescribe azithromycin, the generic version of Zithromax, which tends to be slightly cheaper.

Start Order

To place an order, fill in a brief questionnaire. One of our doctors will review your order and prescribe a suitable treatment.

Azithromycin (2x500mg) £27.50

Price includes prescription and standard delivery.

In a hurry? Choose Click and Collect and pick up your order after just 3 hours from a Superdrug Pharmacy.

Delivery options

Delivery method Cost Estimated delivery

You will choose your delivery option at the checkout. Delivery options may vary depending on the pack size and dosage chosen.

About Zithromax
Zithromax is a branded medication manufactured by Pfizer. It contains azithromycin, an antibiotic which kills chlamydia bacteria. Zithromax tablets therefore work in the same way as generic azithromycin but comes in branded packaging. Branded medicines can be slightly more expensive than generic medication. Please note, product packaging may differ from the image above.

Both medicines are equally effective in treating chlamydia. Which medication you get can vary depending on where you buy your medication. While some pharmacies may stock Zithromax, others may only supply the generic version. 
You should take Zithromax without food, at least one hour before or two hours after you eat. When you take it for chlamydia, you are prescribed a dose of 1g to be taken as one single dose. It is very important that you take the full dose as advised.

If you accidentally take more Zithromax than you have been prescribed, seek medical help immediately.

Zithromax Dosage

The standard dose for treating chlamydia infections is 1g Zithromax. Depending on the dosage of your tablets, you may need to take more than one tablet at the same time.

Can I drink alcohol with Zithromax?

There is no known interaction between Zithromax and alcohol. 

How long does Zithromax take to cure chlamydia?

It can take up to one week for the medication to kill all chlamydia bacteria. During this time, you should avoid sex to prevent passing the infection to your partner. If you decide to have sex during this time, make sure you use a condom to reduce the risk of spreading the infection.

Can I take Zithromax when pregnant or breastfeeding?

If you need to take Zithromax during pregnancy or while breastfeeding, speak to your local GP. Your GP will assess whether the tablets are suitable for you. It may be possible for you to take Zithromax if your GP approves.

Who can take it

You mustn’t take Zithromax if you are allergic to any of the ingredients. The same applies, if you are allergic to any antibiotics which are very similar to azithromycin, such as erythromycin or any other macrolide or ketolide antibiotic. 

ZIthromax is a prescription-only medication and your prescribing doctor will assess whether it is suitable for you before issuing a prescription. 

Make sure you let your doctor know if you are currently trying for a baby, pregnant or breastfeeding. Please note, that Superdrug Online Doctor won’t be able to supply chlamydia treatment to women who are pregnant or breastfeeding. You will need to speak to your local GP if this applies to you.
Some patients experience side effects when taking Zithromax. In most cases, these side effects are mild and temporary. 

At least 1 in 10 people: 

  • stomach cramps and wind
  • feeling sick
  • diarrhoea

Less than 1 in 10 people:

  • dizziness or headache
  • numbness or pins and needles 
  • being sick
  • change in taste or hearing
  • visual disturbances
  • indigestion and loss of appetite
  • itchy rashes and joint aches
  • changes in the composition of your blood, which may show in blood tests

Speak to your doctor immediately if you experience any serious allergic symptoms:

  • sudden wheezing and breathing problems
  • facial swellings, rash or itching
  • severe diarrhoea with blood
  • rapid or irregular heartbeat
  • feeling very faint

For a list of all known side effects of Zithromax read the patient leaflet provided with your tablets.
Like most medications, Zithromax can interact with certain other medicines. It is therefore important that you let your doctor know if you are currently receiving any other treatment or if you have recently finished a course of medication.

The following medications are known to interact with Zithromax:

  • Ergotamine (used to treat migraines)
  • Statins (used to treat high cholesterol levels)
  • Antacids (for heartburn and indigestion)
  • Warfarin and other coumarin type oral anticoagulants
  • Cisapride
  • The hayfever treatment terfenadine
  • Zidovudine and nelfinavir (used to treat HIV)
  • Rifabutin
  • Cyclosporin
  • Alfentanil
  • Theophylline
  • Astemizol
  • Digoxin
  • Pimozide

This means that taking these medications at the same time as Zithromax could weaken or increase their effect or that you could experience serious side effects as a result.

Your prescribing doctor will ask you about your medical history and establish whether you can take Zithromax and how best to take it.