Discontinue use at 1st sign of tendinitis & if psychiatric reactions develop. Avoid use in patients w/ history of serious reactions to fluoroquinolone-containing products & myasthenia gravis. Epilepsy, CNS disorders; history of aneurysm disease, pre-existing aortic aneurysm &/or aortic dissection, presence of other risk factors or conditions predisposing for aortic aneurysm & dissection (eg, Marfan syndrome, vascular Ehlers-Danlos syndrome, Takayasu arteritis, giant cell arteritis, Behcet's disease, HTN, known atherosclerosis); peripheral neuropathy; psychotic patients or history of psychiatric disease. G6PD deficiency, crystalluria; patients w/ solid organ transplants. Avoid prolonged exposure to sunlight or UV radiation. Avoid concomitant use of corticosteroids. Concurrent use w/ antacids, Al-, Ca-, Mg- or Fe-containing prep, anticoagulants (eg, warfarin), pain & inflammation relievers (except aspirin), glibenclamide, probenecid or metoclopramide, cyclosporin, phenytoin. May affect ability to drive or operate machinery. Hepatic & renal impairment. Not recommended during pregnancy & lactation. Elderly >60 yr.