You should not use Levaquin if you are allergic to levofloxacin or other fluoroquinolones such as ciprofloxacin (Cipro), moxifloxacin (Avelox), ofloxacin (Floxin), norfloxacin (Noroxin), lomefloxacin (Maxaquin), and others.

Before taking Levaquin, tell your doctor if you have a heart rhythm disorder, especially if you are being treated with one of these medications: quinidine (Cardioquin, Quinidex, Quinaglute), disopyramide (Norpace), bretylium (Bretylol), procainamide (Pronestyl, Procan SR), amiodarone (Cordarone, Pacerone), or sotalol (Betapace).

If you have certain conditions, you may need a dose adjustment or special tests to safely use Levaquin. Before you take Levaquin, tell your doctor if you have:

    * a history of allergic reaction to an antibiotic;
    *   myasthenia gravis;
    *   joint problems;
    *   kidney or liver disease;
    *   seizures or epilepsy;
    *   diabetes;
    *   low levels of potassium in your blood (hypokalemia); or
    *   a personal or family history of "Long QT syndrome."

FDA pregnancy category C: It is not known whether Levaquin is harmful to an unborn baby. Do not use ciprofloxacin without telling your doctor if you are pregnant. Tell your doctor if you become pregnant during treatment. Levofloxacin can pass into breast milk and may harm a nursing baby. Do not use Levaquin without telling your doctor if you are breast-feeding a baby.