Directions for administration of ZITHROMAX for oral suspension in the single dose packet (1 g): The entire contents of the packet should be mixed thoroughly with two ounces (approximately 60 mL) of water. Drink the entire contents immediately; add an additional two ounces of water, mix, and drink to ensure complete consumption of dosage. The single dose packet should not be used to administer doses other than 1000 mg of azithromycin.. Zithromax; Dosage; Print Share. Zithromax Dosage. Zithromax Z-Pak - can Tums Azithromycin Dose Pack, Zmax. Professional resources. Zithromax . Azithromycin is an antibiotic used for the Yanic, Yi Nuo Da, Yi Song, Yi Xina, Yin Pei Kang, Yong Qi, You Ni Ke, Yu Qi, Z-3, Z-PAK, Zady, Zaiqi, Zaret .