Hypersensitivity. History of tendon disease/disorder assoc w/ quinolones; congenital or documented acquired QT prolongation; electrolyte disturbances eg, hypokalaemia; bradycardia; heart failure w/ reduced left-ventricular ejection fraction; symptomatic arrythmias. Concurrent use w/ class IA (eg, quinidine, procainamide) & class III antiarrythmics (eg, amiodarone, sotalol). Patient w/ liver function impairment (Child Pugh C); transaminases increase >5 fold ULN; CrCl <30 mL/min/1.73 m
2 (serum creatinine >265 μmol/L) or undergoing renal dialysis. Pregnancy & lactation. Patient <18 yr.