click here for details            Z-Pak   (U.S.N.L.M.)
Dosing
 inclusion conjunctivitis, MGD 
Two 250mg tablets the first day,  then 1 tablet per day for 4 days
Chem Specs azithromycin
Quantities Z-Pak = Package of six 250mg tablets.   Tri-Pak = package three 500mg tablets.
Zmax = 1,000mg oral suspension.

Available as 250, 500, 600mg tablets, and single dose powder packets (1 g).
Also as 200mg/5ml suspension in 15, 22.5, 30ml bottle, 100mg/5ml suspension in 15ml bottle.
Cost 16.00/6/250 (Z-Pak generic)
Class extended-spectrum macrolide
Action Blocks bacterial protein synthesis. (Binds ribosome 50s subunit.)
Usage Indicated in the treatment of sinusitis and skin structure infections.
Often used in treatment of inclusion conjunctivitis.
Warnings Use caution with known heart arrhythmias, angina, prior heart attack or chest pain.
Use caution with impaired hepatic function.
Contraindications Hypersensitivity to azithromycin, erythromycin, any macrolide or ketolide antibiotic.
Pediatric use > 5 months
Pregnancy Category B
For chlamydia the current CDC recomendation: One gram in a single dose
(2 tablets, 4 tablets, or suspension). Resistance is endemic in many areas.