Adult Antibacterial 400 mg every 6 hr. Max: 4 g daily. Disseminated gonorrhoea 800 mg every 6 hr for 7 days. Legionnaires' disease 800-1,600 mg every 6 hr. Continuous prophylaxis of Strep infections in patient w/ history of rheumatic heart disease&/or chorea 400 mg every 12 hr. Syphilis 800 mg every 6 hr for 15 days in early syphilis or 30 days in late syphilis. Paed Antibacterial 7.5-12.5 mg/kg every 6 hr or 15-25 mg/kg every 12 hr.
History of cardiac arrhythmias or QT prolongation; hearing loss. Prolonged or repeated therapy. Concomitant use w/ terfenadine. Hepatic impairment. Pregnancy & lactation.
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