Zithromax is the brand name for a medication called azithromycin. It belongs to a class of antibiotics known as macrolides. Azithromycin is primarily used to treat a wide range of bacterial infections, including respiratory tract infections, skin infections, ear infections, and sexually transmitted infections (STIs) such as chlamydia.

Drug Name: Zithromax

Active Ingredient: Azithromycin

Zithromax tablets



Form: Tablet

Type: Generic

Prescription Required: Rx

Availability: In Stock

Azithromycin works by inhibiting the growth of bacteria, thereby helping the body's immune system to eliminate the infection. It is effective against a variety of bacteria, including those that are commonly associated with respiratory infections, such as Streptococcus pneumoniae and Haemophilus influenzae.

Zithromax is available in different formulations, including tablets, oral suspension, and extended-release suspension.

It is important to note that Zithromax should only be used to treat bacterial infections and is not effective against viral infections, such as the common cold or flu. Additionally, it is essential to take the full course of treatment as prescribed, even if symptoms improve before the medication is finished, to ensure that the infection is fully eradicated.

How to use

To use Zithromax (azithromycin) effectively, follow these general instructions:

  1. Follow the prescribed dosage: The dosage will depend on the type and severity of the infection being treated, as well as your age and weight. It is important to follow the prescribed dosage and not exceed or skip any doses.
  2. Take with or without food: Zithromax can be taken with or without food. If you experience stomach upset when taking it on an empty stomach, you may prefer to take it with food.
  3. Swallow the tablet or capsule whole: If you are prescribed Azithromycin in tablet or capsule form, swallow it whole with a full glass of water. Do not crush, chew, or break the tablet or capsule.
  4. Shake the oral suspension: If you are prescribed oral suspension, shake the bottle well before each use to ensure proper mixing of the medication.
  5. Measure the oral suspension accurately: Use the provided measuring device (such as a syringe or measuring spoon) to measure the correct dose of the oral suspension. Do not use a regular household teaspoon, as it may not provide the accurate dose.
  6. Finish the full course of treatment: It is important to complete the full course of treatment, even if you start to feel better before the medication is finished. Stopping the medication prematurely can lead to the return of the infection or the development of antibiotic resistance.
  7. Take at the same time(s) each day: To maintain consistent levels of the medication in your body, try to take Zithromax at the same time(s) each day. This can help optimize its effectiveness.
  8. Do not share medication: Medicine should only be used by the person for whom it is prescribed. Do not share the medication with others, even if they have similar symptoms.


The dosage of Zithromax can vary depending on the type and severity of the infection being treated, as well as other factors such as age and weight. The following are general dosage guidelines for common infections:

Respiratory tract infections:

  • Adults: The typical dosage for respiratory tract infections is a single daily dose of 500 mg for 3 days.
  • Children: The dosage for children will be determined based on their weight. The typical recommended dosage is 10 mg/kg once daily for 3 days. The maximum dose should not exceed 500 mg per day.

Skin and soft tissue infections:

  • Adults: The usual dosage for skin and soft tissue infections is a single daily dose of 500 mg for 5 days.
  • Children: The dosage for children will be determined based on their weight. The typical recommended dosage is 10 mg/kg once daily for 3 days. The maximum dose should not exceed 500 mg per day.

Sexually transmitted infections (STIs):

  • Adults: For the treatment of chlamydia, a single dose of 1 gram (1000 mg) is usually recommended.
  • Children: The use of Zithromax for STIs in children is typically not recommended.

Side effects

Zithromax may cause certain side effects, although not everyone experiences them. Common side effects can include:

  1. Gastrointestinal issues: Nausea, vomiting, diarrhea, abdominal pain, and indigestion are common side effects. Taking Zithromax with food can help reduce these symptoms.
  2. Headache: Some individuals may experience mild to moderate headaches while taking this drug.
  3. Dizziness: Azithromycin can cause a feeling of dizziness or lightheadedness in some people.
  4. Skin reactions: Skin rash, itching, and hives are potential side effects of Zithromax. Seek medical attention if you develop a severe rash or experience any signs of an allergic reaction, such as difficulty breathing or swelling of the face, lips, tongue, or throat.
  5. Changes in taste or smell: Zithromax may alter your sense of taste or smell temporarily.
  6. Fatigue: Feeling tired or experiencing fatigue is another possible side effect.
  7. Vaginal yeast infection: Medicine can disturb the natural balance of bacteria in the body, potentially leading to a vaginal yeast infection in some women.

In rare cases, Zithromax may cause more serious side effects. If you experience severe or persistent diarrhea, severe abdominal pain, irregular heartbeat, or any other severe or unusual symptoms, seek immediate medical attention.


To properly store Zithromax, follow these guidelines:

  1. Keep in its original packaging: Store pharmaceutical product in its original blister pack or container provided by the manufacturer. This helps protect the medication from light, moisture, and other external factors.
  2. Store at room temperature: Medicine should be stored at room temperature, typically between 68°F (20°C) and 77°F (25°C). Avoid exposing the medication to extreme heat or cold, as it may affect its effectiveness.
  3. Protect from light and moisture: Keep tablets away from direct sunlight, and store it in a dry place. Do not store it in the bathroom, where moisture levels are high.
  4. Follow expiration dates: Check the expiration date on the packaging of Zithromax. Do not use the medication beyond its expiration date, as it may no longer be effective.
  5. Keep out of reach of children and pets: Store Zithromax in a secure location, out of the reach of children and pets, to prevent accidental ingestion.
  6. Dispose of properly: If you have any unused or expired Zithromax, do not flush it down the toilet or pour it down the drain. Follow local guidelines for medication disposal or consult your pharmacist for proper disposal methods.

It is important to note that these storage instructions may vary slightly depending on the specific formulation and packaging of Zithromax. Always refer to the package insert or consult your pharmacist for any specific storage requirements.


An overdose of Azithromycin can potentially lead to an increased risk of experiencing severe side effects. If you suspect an overdose or have accidentally taken more than the prescribed dose of Zithromax, it is important to seek immediate medical attention or contact your local poison control center. In the United States, you can reach the Poison Help hotline at 1-800-222-1222.

Signs and symptoms of a Zithromax overdose may include:

  1. Severe nausea, vomiting, or diarrhea
  2. Abdominal pain or cramping
  3. Irregular or rapid heartbeat
  4. Fainting or dizziness
  5. Changes in urine output (increase or decrease)
  6. Severe headache
  7. Blurred vision or other vision problems
  8. Unusual tiredness or weakness
  9. 9. Difficulty breathing

It is important to note that these symptoms may vary, and an overdose can have different effects on different individuals. The severity of the overdose will also play a role in the symptoms experienced.

If you or someone else has taken an overdose of Zithromax, it is crucial to seek immediate medical attention. Contact emergency services or go to the nearest emergency room for evaluation and treatment.

Missed Doses

When it comes to missed doses, the specific instructions can vary depending on the medication. However, here are some general guidelines to keep in mind:

  1. Follow the regular dosing schedule: It is important to take your medications according to the prescribed schedule. Try to establish a routine and take your medication at the same time each day to help you remember.
  2. If you miss a dose, take it as soon as you remember: If you realize you have missed a dose, take it as soon as you remember. However, if it is close to the time for your next scheduled dose, skip the missed dose and resume your regular dosing schedule. Do not double up on doses to make up for a missed one, as this can increase the risk of side effects or complications.

It is important to note that different medications have different guidelines for missed doses. Some medications may require you to take the missed dose as soon as you remember, while others may recommend skipping the missed dose altogether.

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