Azithromycin dosages included the usual dose (250 mg to 500 mg orally once per day; 500 mg intravenously once per day), low dose (less than 250 mg orally once per day; less than 500 mg ...
The usual dose of Zithromax IV is 500 mg for 2 to 5 days. You may then be given 500 mg oral Zithromax once a day for another 2 - 7 days (to complete a 7 to 10 day course of antibiotics).