Azithromycin has been widely evaluated for ... which might come as a pill, a liquid, or a dry powder to which water must be added, followed by 250 mg orally once a day on days 2 to 5.

Azithromycin (as dihydrate) 100mg/5mL, 200mg/5mL; pwd for oral susp. Use packets only for doses equal to 1g. COPD: 500mg once daily for 3 days; or 500mg once for 1 day, then 250mg once daily for 4 ...