Contraindications for Zithromax (Azithromycin)

Do not use Zithromax (Azithromycin) if you:

  • have a liver problems when you have used azithromycin;
  • are hypersensitive or allergic to azithromycin, or any macrolide or ketolide antibiotic (including erythromycin) or other ingredients of Zithromax.

To avoid side effects, talk to your doctor before you take Zithromax (azithromycin).

You should discuss with your doctor any health conditions or problems you may have, including if you:

  • have a known prolonged heart cycle (interval) (QT interval prolongation);
  • are currently taking medication known to prolong QT interval (prolong your heart cycle) such as antipsychotic agents and fluoroquinolones (a class of antibiotics); antiarrhythmics (drugs to regulate your heart beat such as class IA: quinidine, procainamide and class III; dofetilide, amiodarone, sotalol); antidepressants;
  • have a history of life-threatening irregular heart beat;
  • have constantly low levels of potassium or magnesium in your blood;
  • have a history for heart problems such as slow heart rate, irregular heart beat or cardiac;
  • insufficiency (your heart has a hard time pumping blood to your body);
  • are pregnant or think you are pregnant;
  • are breastfeeding or planning to breastfeed. Azithromycin has been reported to be excreted in human breast milk. It is not known whether Zithromax may affect your baby;
  • ever had liver or kidney problems;
  • having a weak immune system;
  • ever had an allergic reaction to any medicines, including antibiotics such as erythromycin;
  • have myasthenia gravis (a chronic autoimmune neuromuscular disease that causes muscular weakness);
  • have hereditary problems of galactose intolerance, Lapp lactase deficiency or glucoglactose malabsorption as this product contains lactose.

Other warnings you should know about:

You should start to feel better within the first few days, but be sure to take Zithromax (Azithromycin) for the total number of days your doctor prescribed. Although the dose of Zithromax (Azithromycin) is short, you should not expect Zithromax (Azithromycin) to work faster than other antibiotics that are dosed up to 10 days. If you stop taking Zithromax (Azithromycin) too soon, your infection may return. The next infection can be worse and be more difficult to treat. If you can not take all the medicines, tell your doctor.
If you develop diarrhea during or after treatment with Zithromax (Azithromycin), tell your doctor right away. Do not use any medication to treat your diarrhea without first talking to your doctor.
Tell your healthcare provider about all medications you take, including any medications, vitamins, minerals, natural supplements or alternative medicines.

The following may interact with Zithromax (Azithromycin):

  • Warfarin (or other anticoagulant medicine);
  • Cyclosporin (used to suppress the immune system to prevent and treat rejection in organ or bone marrow transplants);
  • Digoxin (used for treatment of heart problem);
  • Nelfinavir (used for treatment of HIV infections)
  • Ergotamine and ergot derivatives (used for migraine treatment). Ergotamine and ergot derivatives should not be used with Zithromax (Azithromycin).

Some medicines may affect how well Zithromax (Azithromycin) works. Check with your doctor before starting any new prescription or over-the-counter medicines, including natural/herbal remedies or antacids, while on Zithromax (Azithromycin).