Azithromycin is an antibiotic that can treat several infections. It is most commonly used to treat infections in the chest, sinus and skin as well as Lyme disease and some STIs. 


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What is Azithromycin?

Azithromycin is an antibiotic medicine that can treat many infections including those found in the chest, sinuses, and skin as well as sexually transmitted infections. Azithromycin is especially effective for treating traveller's diarrhoea.

How does it work?

Azithromycin belongs to a group of medicines called macrolide antibiotics. These medicines work to kill bacteria that cause diarrhoea infections.

Is Azithromycin right for me?

Azithromycin should be taken at the first signs of traveller's diarrhoea. You should consider taking this medication if you are travelling to certain parts of Africa, South-East Asia, Pakistan and India.

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Side Effects

All medications can cause potential side effects, below we have listed some potential side effects, however these do not always occur.

  • Diarrhoea
  • Abdominal pain
  • Nausea
  • Flatulence
  • Lack of appetite
  • Feeling dizzy
  • Headache
  • Tingly sensation or numbness
  • Changes in your sense of taste
  • Vision impairment
  • Deafness
  • Vomiting, stomach pain or other digestion problems
  • Skin rashes and itching
  • Joint pain
  • Fatigue

Disclaimer: This website does not constitute as medical advice, you should also consult with a doctor before taking medication. If you experience any major reactions to any medication you are taking, you must seek immediate medical attention.


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Commonly Used Dosage Guidelines for Azithromycin 

For 250mg strength

  • Take all four tablets together at one time as a single dose.

For 500mg strength

  • Take one tablet once a day. Start the course as soon as you get diarrhoea. 

Disclaimer: This website does not provide medical advice. No information listed on this website is intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment before undergoing a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Additional Information

Azithromycin is an antibiotic. It fights bacteria in your body. Azithromycin welzo is used to treat many different types of infections caused by bacteria, such as respiratory infections, skin infections, ear infections, and sexually transmitted diseases. Azithromycin welzo may also be used for purposes not listed in this medication guide.

You should not use Azithromycin welzo if you are allergic to it erythromycin or clarithromycin (Biaxin), or if:

- you have ever had jaundice or liver problems caused by taking Azithromycin welzo; or

- you are allergic to similar drugs such as azithromycin (Zithromax, Z-Pak), clarithromycin (Biaxin), dirithromycin (Dynabac), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin, Pediazole), or telithromycin (Ketek).

To make sure Azithromycin welzo is safe for you, tell your doctor if you have ever had:

- liver disease;

- kidney disease;

- myasthenia gravis;

- a heart rhythm disorder; or

- long QT syndrome (in you or a family member).

Importance of Taking as Directed

It is important to take this medication exactly as prescribed by your doctor. If you do not take it on schedule, your infection may not improve, and the bacteria may become resistant to antibiotics.

Azithromycin is usually taken for 3 to 5 days. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

To treat gonorrhoea, Azithromycin is usually given as a single dose. If you have chlamydia, Azithromycin is usually taken as a single dose of two pills (1 gram). For other infections, Azithromycin is usually taken once daily.

You may take most forms of Azithromycin with or without food. Take the medicine at the same time each day. Do not take antacids that contain aluminum or magnesium within 2 hours before or after you take Azithromycin. Some antacids can make it harder for your body to absorb Azithromycin.

Do not save for later use.

Azithromycin will not treat a viral infection such as the common cold or flu.

Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Azithromycin will not treat a viral infection such as the flu or a common cold.

Call your doctor if your symptoms do not improve, or if they get worse within the first few days of treatment. Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat. In rare cases, Azithromycin may cause a severe heart problem (QT prolongation in the EKG). This could lead to irregular heartbeat and other symptoms. Call your doctor at once if you have:

- severe stomach pain, diarrhea that is watery or bloody;

- fast or pounding heartbeats, fluttering in your chest, shortness of breath, and sudden dizziness (like you might pass out); or

- jaundice (yellowing of the skin or eyes).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. 

Keep using this medicine for the full treatment time, even if you feel better after the first few doses.

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What should I not take with Azithromycin?

Do not take azithromycin at the same time as antacids that contain aluminium or magnesium. This includes Mylanta, Tums, Maalox, Rolaids, or Milk of Magnesia. These antacids can make azithromycin less effective when taken at the same time.

Why is Azithromycin given for 3 days?

The half-life of azithromycin is 68 hours, so it is possible to take the medication for 3 days and still have therapeutic levels of the drug in your system. This makes it a convenient option for treating bacterial infections. It is important to finish the entire course of antibiotics, even if you are feeling better, to make sure that the infection is completely gone.

Is this medication suited for me?

Please get in touch with a doctor if you are unsure what medication is suitable for you. You can also complete our online consultation form to check your eligibility for the product.

How is the medication delivered?

All orders placed before 14:00 from Monday to Friday will be dispatched that day. The orders are sent using 24 Hour Tracked delivery provided by Royal Mail. Items will usually arrive the very next day after the order has been placed. We also provide tracking for your orders to check the status and location of your parcel. All our medication is packaged in plain confidential padded white or brown envelopes. This ensures that your orders are discreet, and the content of the orders will be for your eyes only.

What bacteria is Azithromycin used to treat?

Azithromycin is used to treat a wide variety of bacterial infections. This medication will not work for viral infections (such as common cold, or flu). Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness.

Is Azithromycin a strong antibiotic?

Azithromycin is a macrolide antibiotic, and it is classified as a moderate-strength antibiotic. Azithromycin is used to treat a wide variety of bacterial infections, including skin infections, ear infections, respiratory infections, and sexually transmitted diseases. It is important to finish the entire course of antibiotics, even if you are feeling better, to make sure that the infection is completely gone.

How do I order my medication?

Some products only require an online consultation which approximately takes 1 minute to complete, enabling you to then buy the product. Other products will also require a prescription; in this case, you will need to complete the online consultation, and then one of our partner pharmacy prescribers or doctors will review the online consultation questions and approve the order for delivery if you are eligible to purchase the item.

Can I cancel or return my order?

For non-medicinal products, you are eligible to return the product within 14 days of receipt in the same packaging you received. For medicinal products, you are eligible to cancel the order only until it has been dispatched. From that point forward, you are no longer eligible to return the order.

You have the right to cancel your order for medication up to the point when your medication is dispatched.

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