Zithromax, also called Azithromycin, is used to treat bacterial infections in many different parts of the body. It is also used to prevent Mycobacterium Avium Complex (MAC) disease in patients infected with the Human Immunodeficiency Virus (HIV). It works by killing bacteria or preventing their growth
Be sure to tell your doctor of any allergies you have whether it is to medication or food, preservatives, or dyes. Also, tell your doctor of any other medications you are taking, including vitamins and supplements, and any medical conditions you may have.
It is very important that you take this medicine exactly as your doctor tells you to. Do not take more or less medicine than directed, and don’t stop taking Zithromax without discussing it with your doctor first.
If you miss a dose of this medicine, take it as soon as you remember, unless it is almost time for your next dose. Do NOT double doses.
Stop taking Zithromax and get medical help immediately if any of the following side effects occur: abdominal or stomach cramps or pain; abdominal tenderness; diarrhea (watery and severe, which may be bloody); difficulty in breathing; fever; joint pain; skin rash; or swelling of face, mouth, neck, hands, and feet.
Zithromax (azithromycin tablets, azithromycin capsules and azithromycin for oral suspension) contain the active ingredient azithromycin, an azalide, a subclass of macrolide antibiotics, for oral administration. Azithromycin has the chemical name (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[ (2,6-dideoxy-3-C-methyl-3-O -methyl-a-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10- trihydroxy-3,5,6,8,10,12,14-heptamethyl-11- [[3,4,6-trideoxy-3-(dimethylamino)-b-D- xylo-hexopyranosyl]oxy]-1-o xa-6- azacyclopentadecan-15-one. Azithromycin is derived from erythromycin; however, it differs chemically from erythromycin in that a methyl-substituted nitrogen atom is incorporated into the lactone ring. Its molecular formula is C38H72N2O12. Azithromycin, as the dihydrate, is a white crystalline powder with a molecular formula of C38H72N2O12.2H2O and a molecular weight of 785.0. Zithromax is supplied for oral administration as film-coated, modified capsular shaped tablets containing azithromycin dihydrate equivalent to 250 mg azithromycin and the following inactive ingredients: dibasic calcium phosphate anhydrous, pregelatinized starch, sodium croscarmellose, magnesium stearate, sodium lauryl sulfate, hydroxypropyl methylcellulose, lactose, titanium dioxide, triacetin and D&C red #30 aluminum lake. Zithromax for oral suspension is supplied in bottles containing azithromycin dihydrate powder equivalent to 300 mg, 600 mg, 900 mg, or 1200 mg azithromycin per bottle and the following inactive ingredients: sucrose; sodium phosphate; tribasic; anhydrous; hydroxypropyl cellulose; xanthan gum; FD&C red #40; and spray dried artificial cherry, creme de vanilla and banana flavors. After constitution, each 5 ml of suspension contains 100 mg or 200 mg of azithromycin.
Zithromax has the following structural formula: