Gemifloxacin absorption is significantly reduced when aluminium or magnesium containing antacids and iron salts are concomitantly administered. Gemifloxacin should be taken at least 2 hours before or 3 hours after these agents. Gemifloxacin should be taken at least 2 hours before sucralfate administration. No clinically significant interactions have been observed when Gemifloxacin was co-administered with omeprazole theophylline, digoxin, warfarin and oral contraceptives.