Prescription only. Do not take without a doctor's instruction. Inform your doctor of all medications you take — azithromycin has interactions with blood thinners, antacids, and heart medications.
Azithromycin (sold as Zithromax or Z-Pack) is one of the most commonly prescribed antibiotics in Korea for treating chest infections, throat infections, sinusitis, and chlamydia.
Azithromycin is a macrolide antibiotic that works by stopping bacteria from making proteins needed to grow and multiply. It is effective against a wide range of bacteria and is widely used in Korea for community-acquired pneumonia, bronchitis, strep throat, sinusitis, skin infections, and sexually transmitted infections such as chlamydia.
Azithromycin is often prescribed as a short course — typically a 3 or 5-day regimen — which makes it convenient for patients. In Korea, it is available by prescription only from licensed pharmacies. It should only be taken when a doctor has confirmed a bacterial infection, as overuse contributes to antibiotic resistance, which is a major global health concern and is monitored by the Korea Disease Control and Prevention Agency (KDCA).
Azithromycin gained widespread attention worldwide during the COVID-19 pandemic, where it was temporarily used in some treatment protocols. However, subsequent clinical evidence did not support its use for COVID-19, and its use should be restricted to proven bacterial infections only. Always complete the full prescribed course even if you feel better, and inform your doctor if you have a history of heart rhythm problems, as azithromycin can affect the heart's electrical activity (QT prolongation).
Key Points
- Macrolide antibiotic — effective against many common bacterial infections
- Common Z-Pack course: 500mg on day 1, then 250mg for days 2–5
- Available by prescription only from Korea pharmacies
- Do not use for viral infections — antibiotics do not treat colds or flu
- Caution in patients with liver disease or heart rhythm disorders
- Antibiotic resistance risk — complete the full prescribed course
When to See a Doctor
- Severe allergic reaction: rash, difficulty breathing, swelling of face or throat — seek emergency care
- Irregular heartbeat or palpitations while taking azithromycin
- Severe diarrhoea during or after treatment (possible C. diff infection)
- Symptoms not improving after completing the course
- If you are pregnant, breastfeeding, or have liver or heart conditions — inform your doctor before starting
For emergencies in Korea, call 119
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This content is published for educational purposes only. For accurate diagnosis and personalised treatment, consult a licensed KMA physician in Korea.
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This article is published by DoctorsInKorea.com for educational and informational purposes only. It does not replace a professional clinical evaluation by a licensed healthcare provider. For accurate medical diagnosis and personalised treatment paths, please book an appointment with a licensed KMA physician. For immediate life-threatening medical emergencies in Korea, please call 119.
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Last reviewed: March 1, 2025