Medicine & Antibiotic Guide
Azithromycin Tablet: Uses, Side Effects, Composition, Dosage & Price
Azithromycin is a macrolide antibiotic used for selected bacterial infections. The right dose depends on the infection and patient, so it should be taken only as prescribed.
QUICK ANSWER
What is azithromycin used for? It is prescribed for susceptible bacterial infections such as selected respiratory, ear, skin and sexually transmitted infections. It does not treat common viral infections.
What about azithromycin 500 mg? 500 mg is one available strength, not a universal dose. Current prescribing information uses different schedules for different infections.
Important: Do not self-start antibiotics for fever, cold, cough or sore throat without a medical assessment.
Azithromycin at a Glance
01
Drug class
Macrolide antibacterial medicine.
02
Available strengths
Common oral strengths include 250 mg and 500 mg tablets; liquid formulations are also available.
03
Prescription medicine
Use it only when a clinician has identified or strongly suspects a bacterial infection for which azithromycin is appropriate.
What Is Azithromycin?
Azithromycin is a macrolide antibiotic. It works against susceptible bacteria by interfering with bacterial protein synthesis. It is used for specific bacterial infections rather than for viral illnesses.
Current FDA prescribing information lists indications including selected bacterial respiratory infections, uncomplicated skin infections, certain sexually transmitted infections, acute otitis media in children and other specified conditions. The exact approved indications depend on the product and patient population.
Azithromycin Tablet Uses
01
Respiratory infections
Selected bacterial pneumonia, acute bacterial sinusitis and acute bacterial exacerbations of chronic bronchitis.
02
Ear infections
Selected acute otitis media, including specific pediatric indications.
03
Throat infections
Selected pharyngitis or tonsillitis when azithromycin is an appropriate alternative.
04
Skin infections
Selected uncomplicated skin and skin-structure infections caused by susceptible bacteria.
05
Selected STIs
Specific urethritis, cervicitis and other sexually transmitted infections may be treated with an appropriate regimen.
06
Other specialist uses
Other uses may be appropriate in selected patients under specialist guidance. The diagnosis determines whether azithromycin is suitable.
Azithromycin is not a general-purpose fever medicine.
A fever may be caused by a virus, malaria, dengue, typhoid or another condition. Antibiotic treatment should be based on clinical assessment.
Azithromycin Composition
The active pharmaceutical ingredient is azithromycin. A 500 mg tablet contains 500 mg of azithromycin, while inactive ingredients vary between brands and manufacturers.
| Form | Common strength / presentation | Important point |
|---|---|---|
| Tablet | 250 mg, 500 mg | Take according to the prescribed regimen. |
| Capsule | 250 mg in some products | Follow the product-specific instructions. |
| Oral suspension | 100 mg/5 mL or 200 mg/5 mL | Measure liquid with the supplied dosing device. |
| Injection | Available in hospital formulations | Administered under professional supervision. |
Azithromycin Dosage: What Is the Right Dose?
There is no single azithromycin dose that is correct for every infection. The prescription depends on the infection, age, weight, formulation, kidney or liver considerations, drug interactions and clinical severity.
Tablet strength is not a treatment plan
A 500 mg tablet does not mean that everyone should take the same daily dose or the same number of days. Children need an individual prescription and the correct liquid strength where appropriate.
Sexually transmitted infections require diagnosis, an appropriate treatment plan and partner advice. Azithromycin alone is not recommended for gonorrhoea in CDC guidance because of resistance and treatment failures. A medicine label example should not replace current local treatment guidance.
Do not share antibiotics, use leftover tablets or repeat a previous course without assessment. Ask the prescriber to clarify any uncertainty about the dose or duration.
How to Take Azithromycin
- Take it exactly as prescribed and at the recommended time.
- Do not double the dose if you miss one.
- Swallow tablets or capsules with water unless your formulation instructions say otherwise.
- Follow the food instructions on your specific product. Some tablet/capsule instructions recommend taking it at least 1 hour before or 2 hours after food.
- Separate azithromycin from aluminium- or magnesium-containing antacids according to the product or pharmacist instructions.
- Do not stop or extend treatment on your own, except when a serious reaction requires stopping the medicine and urgent medical help as described below.
Azithromycin Side Effects
01
Diarrhoea
One of the common gastrointestinal side effects.
02
Nausea
Feeling sick can occur during treatment.
03
Abdominal pain
Stomach discomfort or pain can occur.
04
Vomiting
Vomiting is another recognised gastrointestinal adverse effect.
05
Headache / dizziness
Headache, dizziness or tiredness may occur in some people.
06
Taste changes
Temporary changes in taste have been reported.
Serious Azithromycin Side Effects
Serious reactions are uncommon but can require urgent treatment. The current FDA label warns about serious allergic reactions, liver injury, QT prolongation and potentially dangerous abnormal heart rhythms, C. difficile-associated diarrhoea and worsening muscle weakness in people with myasthenia gravis.
- Fast or irregular heartbeat, fainting or significant palpitations
- Severe allergic reaction, facial or throat swelling or breathing difficulty
- Severe rash, blistering or peeling skin
- Yellow skin or eyes, dark urine or other signs of liver injury
- Severe or bloody persistent diarrhoea
- Severe abdominal pain or other symptoms concerning for pancreatitis
Who Should Be Careful With Azithromycin?
- People with previous allergy to azithromycin, erythromycin, macrolides or ketolides.
- People with a history of liver problems related to previous azithromycin treatment.
- People with certain heart-rhythm conditions or prolonged QT interval.
- People taking other medicines that can prolong the QT interval.
- People with myasthenia gravis.
- People with significant liver or kidney problems should tell the prescriber before treatment.
Azithromycin Drug Interactions
Tell your doctor or pharmacist about all prescription medicines, over-the-counter medicines and supplements you take. Important interactions and precautions can involve medicines such as warfarin and other drugs that affect cardiac rhythm. Some antacids can also affect absorption depending on the formulation.
Never change a prescribed medicine simply because an interaction is listed online. A pharmacist or clinician can determine whether a timing adjustment, monitoring or alternative is needed.
Azithromycin Price in India
Prices differ by brand, formulation, pack size, batch and pharmacy. Check the printed MRP and the pharmacy’s current selling price for the exact product prescribed. This page does not provide a verified current price or hospital quotation.
Azithromycin vs Viral Infection: Why Antibiotics Are Not Always Needed
Azithromycin treats susceptible bacteria; it does not kill viruses. Colds, influenza and many uncomplicated sore throats or viral fevers do not improve because an antibiotic was taken. Unnecessary antibiotic exposure can cause adverse effects and contributes to antimicrobial resistance.
If fever, cough or sore throat persists or worsens, a clinician can assess whether the cause is viral, bacterial or another condition and decide whether testing or treatment is needed.
When Should You See a Doctor?
Seek medical assessment if symptoms are severe, persistent, repeatedly returning, or associated with breathing difficulty, chest pain, fainting, dehydration, severe diarrhoea or an allergic reaction.
Do not self-medicate with antibiotics
Choosing an antibiotic depends on the likely infection, local resistance patterns, allergies, other medicines and individual medical history.
General Medicine ConsultationGENERAL MEDICINE CONSULTATIONGeneral Medicine
Dr. Ch. Srujith
MBBS, MD — General Physician & Diabetologist
Azithromycin – Frequently Asked Questions
What is azithromycin used for?
Azithromycin is a macrolide antibiotic used for certain bacterial infections when the causative bacteria are susceptible. Depending on the formulation and indication, it may be prescribed for selected respiratory, ear, skin and sexually transmitted infections.
Is azithromycin an antibiotic?
Yes. Azithromycin is a macrolide antibacterial medicine. It treats susceptible bacterial infections and does not treat viral infections such as most common colds or uncomplicated viral fever.
What is the composition of azithromycin 500 mg?
Azithromycin 500 mg tablets contain azithromycin as the active ingredient. The inactive ingredients vary by manufacturer and brand, so the product label should be checked for the complete formulation.
What is azithromycin 500 mg used for?
Azithromycin 500 mg may be prescribed for selected bacterial infections. The exact indication and dose depend on the infection, patient age, medical history and the prescribing clinician's assessment.
What is the usual azithromycin dose for adults?
The dose and course depend on the diagnosis, age, weight, formulation and medical history. A 500 mg tablet is a strength, not a universal regimen. Follow the individual prescription and do not use another person’s schedule.
Can I take azithromycin for viral fever or a cold?
No. Azithromycin does not treat viruses. Taking an antibiotic when a bacterial infection is not present exposes you to side effects and contributes to antibiotic resistance.
What are the common side effects of azithromycin?
Common side effects include diarrhoea, nausea, abdominal pain and vomiting. Headache, dizziness and changes in taste can also occur.
Can azithromycin cause diarrhoea?
Yes. Diarrhoea is one of the more common side effects. Severe, persistent or bloody diarrhoea needs medical assessment because antibiotic-associated C. difficile infection can occur.
Can azithromycin affect the heart?
Azithromycin can prolong the QT interval and, rarely, cause serious abnormal heart rhythms. The risk is more important in people with certain heart conditions, a history of QT prolongation or other risk factors or medicines that affect cardiac rhythm.
Who should not take azithromycin?
People with a known allergy to azithromycin, erythromycin or another macrolide or ketolide should not take it. It is also contraindicated in people with a history of cholestatic jaundice or hepatic dysfunction associated with previous azithromycin use.
Can azithromycin cause liver problems?
Yes. Serious liver injury has been reported rarely. Seek medical advice promptly if yellowing of the skin or eyes, dark urine, unusual itching or other symptoms of hepatitis develop.
Can I take azithromycin with antacids?
Some antacids can affect azithromycin absorption. Follow the medicine label and pharmacist or doctor instructions; the NHS advises separating azithromycin tablets or capsules from antacids containing aluminium or magnesium.
Can I take azithromycin with food?
Follow the leaflet for your exact product. Food instructions can vary between formulations and brands; ask your pharmacist if the directions are unclear.
How long does azithromycin take to work?
Many people begin to feel better within a few days, but the expected response depends on the infection. Contact a clinician if symptoms are not improving after about 3 days or if they worsen at any time.
Should I finish the azithromycin course?
Take azithromycin exactly as prescribed and complete the prescribed course unless a healthcare professional tells you to stop or a serious reaction requires immediate discontinuation.
What happens if I miss an azithromycin dose?
Take the missed dose when you remember unless it is nearly time for the next dose. In that case, skip the missed dose and continue the regular schedule. Do not take two doses together.
What is the price of azithromycin 500 mg in India?
The price varies with brand, formulation, pack size, batch and seller. Check the printed MRP and current pharmacy price. This page does not provide a verified current quotation.
Is azithromycin available as a tablet, syrup or injection?
Azithromycin is available in several formulations, including tablets, capsules, oral suspension and injectable forms. Availability and strengths vary by manufacturer and market.
Can azithromycin be taken during pregnancy?
Do not start or stop azithromycin during pregnancy without medical advice. A clinician can weigh the benefit of treating a bacterial infection against individual risks and select an appropriate antibiotic when needed.
When should I seek urgent help after taking azithromycin?
Stop azithromycin and seek immediate medical help for breathing difficulty, swelling of the face or throat, or a severe rash or blistering. Stop it and obtain urgent medical assessment for signs of hepatitis such as yellow skin or eyes or dark urine. Fainting, chest pain, a fast or irregular heartbeat, or severe persistent diarrhoea also requires urgent assessment.
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