Why is Zithromax prescribed?
Zithromax is an antibiotic related to erythromycin. It is prescribed for adults to treat certain mild to moderate skin infections; upper and lower respiratory tract infections, including pharyngitis (strep throat), tonsillitis, sinus infections, worsening of chronic obstructive pulmonary disease, and pneumonia; sexually transmitted infections of the cervix or urinary tract; and genital ulcer disease in men. In children, Zithromax is used to treat middle ear infection, pneumonia, tonsillitis, and strep throat.
Most important fact about Zithromax
There is a possibility of rare but very serious reactions to Zithromax, including angioedema (swelling of the face, lips, and neck that impedes speaking, swallowing, and breathing), anaphylaxis (a violent, even fatal allergic reaction), and serious skin diseases. If you develop these symptoms, stop taking Zithromax and call your doctor immediately.
How should you take Zithromax?
Take Zithromax capsules at least 1 hour before or 2 hours after a meal. Zithromax tablets and oral suspension can be taken with or without food. Do not take any form with an antacid that contains aluminum or magnesium, such as Di-Gel, Gelusil, Maalox, and others.
If you are using single-dose packets of Zithromax powder for oral suspension, mix the entire contents of each packet with 2 ounces of water, drink immediately, then add an additional 2 ounces of water, mix again, and drink to make sure you've taken the entire dose. When giving the pediatric suspension, shake the bottle thoroughly before each use and measure the dose with the supplied calibrated dropper. Use the pediatric suspension within 10 days and throw out any that remains.
Your doctor will only prescribe Zithromax to treat a bacterial infection; it will not cure a viral infection, such as the common cold. It's important to take the full dosage schedule of Zithromax, even if you're feeling better in a few days. Not completing the full dosage schedule may decrease the drug's effectiveness and increase the chances that the bacteria may become resistant to Zithromax and similar antibiotics.
--If you miss a dose...
Take the forgotten dose as soon as you remember. If you don't remember until the next day, skip the dose and go back to your regular schedule. Never try to "catch up" by doubling the dose.
--Storage instructions...
Zithromax should be stored at room temperature.
What side effects may occur?
Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Zithromax.
• More common side effects may include:
Abdominal pain, diarrhea or loose stools, nausea or vomiting
The single large dose of Zithromax that is prescribed to treat sexually transmitted infection of the cervix or urinary tract is more likely to cause stomach and bowel side effects than the smaller doses prescribed for a skin or respiratory tract infection.

Why should Zithromax not be prescribed?
Do not take Zithromax if you have ever had an allergic reaction to it or to similar antibiotics such as erythromycin (E.E.S., PCE, and others).
Special warnings about Zithromax
Like certain other antibiotics, Zithromax may cause a potentially life-threatening form of diarrhea called pseudomembranous colitis. Pseudomembranous colitis may clear up spontaneously when the drug is stopped; if it doesn't, hospital treatment may be required. If you develop diarrhea, check with your doctor immediately.
If you have a liver problem, your doctor should monitor you very carefully while you are taking Zithromax.
Possible food and drug interactions when taking Zithromax
Do not take Zithromax with antacids containing aluminum or magnesium, such as Maalox and Mylanta.
If Zithromax is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Zithromax with the following:

Nelfinavir (Viracept)
Warfarin (Coumadin)
Digoxin (Lanoxin, Lanoxicaps)
Ergot-containing drugs such as Cafergot and D.H.E.
Cyclosporine (Neoral and Sandimmune)
Hexobarbital
Phenytoin (Dilantin)
Special information if you are pregnant or breastfeeding
If you are pregnant or plan to become pregnant, inform your doctor immediately. You should take Zithromax during pregnancy only if it is clearly needed. It is not known whether Zithromax can make its way into breast milk. If the drug is essential to your health, your doctor may advise you to stop breastfeeding until your treatment is finished.
Recommended dosage
ADULTS
Pneumonia, Chronic Obstructive Pulmonary Disease, Tonsillitis, Strep Throat, and Skin Infections
The usual dose of Zithromax is 500 milligrams in a single dose the first day. This is followed by 250 milligrams once daily for the next 4 days. Alternatively, patients with chronic obstructive pulmonary disease may be prescribed 500 milligrams a day for 3 days.
Sinus Infection
The usual dose of Zithromax is 500 milligrams once a day for 3 days.
Genital Ulcer Disease
The usual dose is a single gram (1,000 milligrams) one time only.
Sexually Transmitted Diseases
The usual dose is a single 2-gram (2,000 milligrams) dose.
CHILDREN
Middle Ear Infection
For children aged 6 months and up, treatment may be given three ways. One option is a single dose of 30 milligrams per 2.2 pounds of body weight. Another option is a dose of 10 milligrams per 2.2 pounds given each day for 3 days. Zithromax can also be given over a period of 5 days, starting with a dose of 10 milligrams per 2.2 pounds on the first day and continuing with daily doses of 5 milligrams per 2.2 pounds for the next 4 days.
Sinus Infection
For children aged 6 months and up, the usual dose is 10 milligrams of Zithromax suspension per 2.2 pounds of body weight given once daily for 3 days.
Pneumonia
For children aged 6 months and up, the usual dose is 10 milligrams of Zithromax suspension per 2.2 pounds of body weight in a single dose the first day, followed by 5 milligrams per 2.2 pounds for the next 4 days.
Strep Throat and Tonsillitis
For children aged 2 years and up, the usual dose is 12 milligrams per 2.2 pounds of body weight once daily for 5 days.
Overdosage
Although no specific information on Zithromax overdose is available, any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.
Compare Zithromax with other medications for the treatment of:
Otitis Media, Bronchitis, Tonsillitis/Pharyngitis, Sinusitis, Skin Infection, Common Cold, Pneumonia, Bacterial Endocarditis Prevention, Pelvic Inflammatory Disease, Gonococcal Infection -- Uncomplicated, Nongonococcal Urethritis, Pharyngitis, Toxoplasmosis, Mycoplasma Pneumonia, Lyme Disease -- Erythema Chronicum Migrans, Mycobacterium avium-intracellulare -- Treatment, Typhoid Fever, Chancroid, Chronic Obstructive Pulmonary Disease -- Acute, Legionella Pneumonia, Mycobacterium avium-intracellulare -- Prophylaxis, Cervicitis