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Azithromycin

Chlamydia|Active ingredient(s): Azithromycin|Manufacturer: Various

A young woman taking a white tablet with a glass of water

Effective Chlamydia Treatment With a Single Dose

  • Highly effective treatment for chlamydia
  • Only one dose needed for most infections
  • Well-established safety profile
  • Suitable during pregnancy
  • Available as 500 mg tablets

How to take

A woman taking a tablet with a glass of water

Take your dose

Swallow your single 1 g dose of Azithromycin with a glass of water.

A woman stretching in bed looking out of her window

Let your body rest

Give the medicine time to work and let your body fight off the infection.

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Get back on track

Wait 7 days before having sex and enjoy getting back to normal once treatment is complete.

What others say about Azithromycin

Trustpilot review
60 reviews with score 4.8

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Prescription is included.

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UK: Free next-day delivery.
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Azithromycin

What is Azithromycin?

Azithromycin is an antibiotic used to treat several bacterial infections, but most commonly for STIs like chlamydia. While Doxycycline is often the first-line treatment for bacterial infections, Azithromycin remains a widely used and effective alternative. It is also more suitable for pregnant women or those needing a shorter course of treatment.

At 121doc, we prescribe Azithromycin tablets to treat chlamydia, with a single dose of two 500 mg tablets usually enough to cure the common STI.

How does Azithromycin work?

Azithromycin works by preventing bacteria from making a protein they need in order to reproduce. By stopping the bacteria from spreading, Azithromycin gives your immune system time to kill the remaining bacterial cells, clearing the infection from your body.

Unlike other antibiotics that require lengthy treatment courses, Azithromycin can clear infections like chlamydia in a single dose. Simply take the amount prescribed, and let your immune system do the rest.

What is Azithromycin used for?

Azithromycin can treat several bacterial infections, not just chlamydia. The most common ones include:

  • strep throat
  • bronchitis
  • pneumonia
  • ear infections
  • skin infections
  • Lyme disease
  • traveller’s diarrhoea

How effective is it?

According to clinical trials, Azithromycin is up to 93.5% effective as a treatment for chlamydia, depending on the site of the infection.

Here are the results of one clinical study in more detail:

  • Genital chlamydia: Azithromycin was 93.5% effective.
  • Anal chlamydia: Azithromycin was 78.5% effective.*

*In this trial, Doxycycline cleared anal chlamydia in 95.4% of patients, making it more effective than Azithromycin for this type of infection. For infections in the anus, Doxycycline may therefore be the preferred treatment.

How long does Azithromycin take to work?

You should feel better within a few days of taking Azithromycin for chlamydia. If you have symptoms, you may still feel them for up to a week. This does not mean the treatment isn’t working.

Despite likely feeling better after a few days, you can still be contagious for up to 7 days after your dose. Avoid sex during this time so you don’t risk passing on the infection to somebody else, or reinfecting yourself before the infection has been fully cleared from your system.

To check whether treatment was effective, you should retest 3-4 weeks after treatment. Retesting before this point can cause a false-positive result, as leftover bacterial DNA can remain in the genital tract for a couple of weeks.

Who can use Azithromycin?

To be prescribed Azithromycin from 121doc, you must be:

  • over 18 years old
  • diagnosed with chlamydia

The first-line treatment for chlamydia is Doxycycline, so Azithromycin is usually only recommended when Doxycycline is unsuitable. This may occur in cases of:

  • Pregnancy: Doxycycline may pose a risk to your developing baby. Please note that a doctor may still deem Azithromycin unsafe during pregnancy and prescribe alternative treatment.
  • Allergy or intolerance to Doxycycline: Azithromycin contains a different active ingredient, so may be safe where Doxycycline is not. Tell your doctor if you believe you may be allergic.

Can you drink alcohol on Azithromycin?

While it’s technically considered safe to drink alcohol on Azithromycin, it is generally advised to avoid alcohol—or, at least, limit your intake—during treatment. This is because the combination of antibiotics and alcohol can worsen side effects or reduce the effectiveness of the medicine.

With that being said, the interaction is less severe with Azithromycin than it is with other antibiotics like Metronidazole. Consult your doctor for personalised advice.

Are there any side effects?

Azithromycin can produce side effects, although not everyone will get them. The most common side effects of Azithromycin include:

  • diarrhoea
  • abdominal pain
  • feeling sick (nausea)
  • loose wind (flatulence)
  • stomach cramps
  • headache
  • loss of appetite
  • dizziness

For a full list of Azithromycin side effects, consult the patient information leaflet.

Can I get Azithromycin without a prescription?

No, Azithromycin can only be purchased with a prescription from a licensed healthcare professional. Safety is our number one priority at 121doc. For this reason, our doctors will only prescribe you treatment if you meet the criteria in your online consultation.

A prescription from a trusted healthcare provider like 121doc ensures:

  • safety during treatment
  • effective results
  • monitoring of side effects
Medical review byDr. Caroline FontanaLast review 10 September 2025
Dr. Caroline Fontana

Note: You must complete a short online consultation so that our doctor can ensure that the treatment is suitable for you. The above pricing should only be used as a reference. The final decision to issue this treatment lies with the prescribing doctor.

Azithromycin Overview

Type of medicine Macrolide antibiotic
Used for Chlamydia, non-specific urethritis, Ureaplasma urealyticum
Active ingredient Azithromycin
Works by Stopping the growth of bacteria causing your infection
Effective within A few days. Always complete the full course prescribed
Available as Tablets
Available dosages 500 mg
Usage instructions Take as prescribed
Packaging Blister packs
Branded available? No

FAQs

What is included in the online consultation?
Will a doctor review my consultation?
What happens after I submit my order?
What services are included with my order?
Is the price all-inclusive?
What are my delivery options?
Is it safe to buy prescription medication online?
Is this service discreet?
What is included in the online consultation?

Our online consultations are in the format of short medical questionnaires. You will be asked general questions about your health and medical history, as well as specific medical questions relevant to the treatment you have chosen. We will also ask you for your payment and delivery details to complete the order.

Online consultations take no longer than 5 minutes to complete. All questions are necessary when issuing prescription medicines. It means that our doctors can make sure the treatment is safe and right for you.

Will a doctor review my consultation?

Yes, it is a legal requirement that all online consultations are reviewed by a registered doctor. This is to make sure the chosen treatment is safe and right for you to take. All personal information is stored securely and confidentially.

Please note, all orders are subject to doctor approval, and we cannot guarantee that your order will be approved.

What happens after I submit my order?

Your online consultation will be sent directly to our medical team, where it will be reviewed by on of our in-house doctors.

If a doctor approves you for treatment, they will issue a prescription. Your prescription will then be forwarded to our pharmacist, where you medication will be dispensed and dispatched for delivery.

What services are included with my order?

Every order includes:

  • Free consultation - your consultation will be personally reviewed by one of our registered doctors.
  • Free prescription - a doctor will issue you a prescription if approved for treatment.
  • Free delivery - we provide free express delivery across Europe, you should receive your order in 1-2 working days.
Is the price all-inclusive?

Yes, our service is all-inclusive and there are no hidden fees. All 121doc orders include a free online consultation, a free prescription and free express delivery.

What are my delivery options?

We offer several delivery options at no extra charge:

  • Next-day delivery
  • UPS Access Point - convenient parcel drop-off and collection near your home or work address
  • Nominated-day delivery - choose the most convenient day for delivery

All these options can be tracked and require a signature on delivery. If you are not in, a friend or relative can sign in your place.

Is it safe to buy prescription medication online?

It is safe to buy prescription medications online from genuine and reputable healthcare providers, like 121doc.

Our medical staff and facilities are registered with the relevant medical governing bodies. We also ensure your data is protected by adhering to European data privacy laws.

You can learn more about our certifications here.

Is this service discreet?

Our patients’ privacy is of utmost importance. All your medical information is securely stored and only viewed by our doctors. We do not share your details with third-parties. We are also closely adhere to data privacy laws.

All orders will only show on invoices, bank statements, etc. as ‘HHC Ltd’.

How does it work?

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Conditions:

Select a condition here or use the top menu. For every condition, we provide you with information as well as the treatments we currently offer. If you don’t know which is best for you, just click the 'Advise-me' button.

Treatments:

If you know what you want, the quickest way to find a specific medication is to use the search bar here.

Ordering:

Every order starts with an online consultation. We will ask you medical questions to make sure only treatment that is safe and effective is prescribed. We take into account your lifestyle, health and any other medications you’re currently using.

The consultation is completely free, and takes between 5 and 10 minutes of your time.

All your information is safe with us. We don’t share it with anyone unless you want us to.

Help:

If you need any guidance, you can call, message or email our customer service team via the ‘How can we help you?' section here.

Prescribe
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Review:

As soon as you place the order, one of our doctors will review your consultation. On working days, this usually takes around one hour.

Questions:

If the doctor has any additional questions, you will receive a phone call and an email. We understand you might be at work or busy. Our customer service representatives are always discreet and can call back at a more convenient time if necessary.

Our emails never contain any personal or medical information, only a link to your private account on our website (where you will find your messages).

Pharmacy:

Once our pharmacy receives your prescription, you will get a second email with your package tracking code.

Deliver
Deliver Expect your delivery the next working day.
Always free. Discreet packaging.
Free next-day delivery

Free:

All orders include next-day delivery. Alternatively, you can select a delivery date that suits you better.

Location:

We also provide a free UPS Access Point service. Pick up your package from one of many collection points across the UK.

With your tracking code, you will know the estimated delivery time. All we need is your signature (or a friend‘s or relative’s).

Discreet:

All parcels are plainly labelled; there is no logo or any indication of its contents. Inside, you will find your treatment as well as a patient leaflet in your chosen language.

Repeat
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Repeat:

With 121doc’s Subscribe & Save service, you can automatically receive your treatment every few weeks or months.

The order will be generated by us, using the information you provided (including delivery frequency). You don’t have to do anything. Payment is taken two days before shipping.

Subscribe:

There are two ways to subscribe. The first is during the order process. The second is via your profile here.

You can cancel or amend your repeat prescriptions at any time.

Save:

There are no sign-up fees with this service. Plus, you get a 10% discount off all future prescriptions, increasing to 15% after six orders!