Antibiotic	Single dose (orally)	Three-day dose (orally)
Azithromycin (Zithromax)	1,000 mg	500 mg per day*
Ciprofloxacin	750 mg	500 mg per day
Levofloxacin (Levaquin)	500 mg	500 mg per day
Ofloxacin	400 mg	400 mg per day
Rifaximin (Xifaxan)†	None	200 mg three times per day