Azithromycin, antibiotic drug used to treat a variety of infections, such as tonsillitis (inflamed and swollen tonsils), bronchitis, pneumonia, skin infections, and urinary tract infections. It works by interfering with the formation of important proteins inside the invading bacteria, which kills the bacteria.

Available in capsule form, azithromycin is taken orally and is available only by prescription. It is typically prescribed for five days, with a 500-mg single dose the first day followed by 250-mg doses each day thereafter. Improvement is often seen after three or four days of treatment. Certain ailments, such as sexually transmitted infections, may be treated with a single dose of 1000 mg. Azithromycin should be taken on an empty stomach (one hour before or two hours after a meal). This drug is not recommended for use by children under 16 and should not be used by pregnant women or patients with liver problems, unless approved by a doctor. It is not known if the drug poses a risk for nursing mothers and their babies.

Potential common side effects include abdominal pain, diarrhea, nausea, or vomiting. Less common are chest pain, dizziness, drowsiness, headache, indigestion, jaundice, light sensitivity, hives, or yeast infection. Some serious but rare reactions have been reported. These reactions include swelling of the face and neck, which interferes with breathing; a severe form of diarrhea; and anaphylaxis, a potentially fatal allergic reaction. Patients who suspect any of these conditions may need immediate medical help.

Azithromycin should not be combined with antacids containing aluminum or magnesium. The drug may interact adversely with carbamazepine, cyclosporine, digoxin, hexobarbital, lovastatin, phenytoin, triazolam, and warfarin. It also may interact with certain antihistamines (especially astemizole).

What is this medicine used for? This medicine is used to prevent or treat a variety of bacterial infections.

How does it work? Azithromycin works to injure the bacteria and fight the infection.

How is it best taken? To gain the most benefit, do not miss doses. Use prescription as directed, even if feeling better.

Zithromax®: Take this medicine with or without food. Take with food if it causes an upset stomach. A liquid (suspension) is available if you cannot swallow pills. Shake well before use. Empty single dose liquid (suspension) packet in 1/4 cup of water. Mix well and drink. Rinse with more water and drink. Those who have feeding tubes can also use the liquid. Flush the feeding tube before and after medicine is given. Stop tube feeding for 2 hours before giving this medicine. Restart tube feeding 1 hour after giving.

Zmax™ : Take liquid (suspension) on an empty stomach. Take 1 hour before or 2 hours after meals.

This medicine is given as a shot into a vein.

Eye solution: For the eye only. Wash hands before and after use. Take out contact lenses before using medicine. Lenses can be replaced 15 minutes after medicine is given. Do not put contacts back in if eyes are irritated or infected. Do not touch the container tip to the eye, lid, or other skin. Tilt head back and drop medicine into eye. After using medicine, keep your eyes closed. Apply pressure to the inside corner of the eye. Do this for 3-5 minutes. This keeps the medicine in your eye. Separate each eye medicine by 5 minutes.

What do I do if I miss a dose? (does not apply to patients in the hospital) Use a missed dose as soon as possible. If it is almost time for the next dose, skip the missed dose and return to your regular schedule. Do not use a double dose or extra doses.

What are the precautions when taking this medicine? If you have kidney disease, talk with healthcare provider. If you have liver disease, talk with healthcare provider. Check medicines with healthcare provider. This medicine may not mix well with other medicines. Tell healthcare provider if you are pregnant or plan on getting pregnant. Tell healthcare provider if you are breast-feeding.

What are some possible side effects of this medicine? Belly pain. Nausea or vomiting. Small frequent meals, frequent mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help. Diarrhea. Yogurt, Bifidobacterium bifidum, or Lactobacillus acidophilus may help. These products are available at health food stores or in some pharmacies. Eye: Short-term discomfort after use.

What should I monitor? Change in condition being treated.


1. Antibiotics classification ; 2. Antibiotics types; 3. Antibiotics resistance; 4. Antibiotics production;

5. Penicillins; 6. Erythromycin; 7. Azithromycin; 8. Tetracycline; 9. Antibiotics common information;

10. Amoxicillin


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