Establishes the medication azithromycin (Zithromax, Zithromax Tri-Pak, Zithromax Z-Pak, Zmax), a drug that is effective against susceptible bacteria causing infections, and certain sexually transmitted infectious diseases. Read more about the prescription drug azithromycin (Zithromax, Zithromax Tri-Pak, Zithromax Z-Pak, Zmax). Zithromax Z-PAK (azithromycin) is a semi-synthetic macrolide antibiotic used for treating: otitis media (middle ear infection), tonsillitis, laryngitis, Azithromycin (Zithromax) is used for treating a variety of bacterial infections, such as cat-scratch disease, ear infections and throat or tonsil infections. Azithromycin is usually taken once a day, unless you're having it by injection. Try to take your medicine at the same time each day. The usual dose is 500mg a day for 3 to 10 days depending on the infection being treated. Easy-to-read patient leaflet for Azithromycin Tablets. Includes indications, proper use, special instructions, precautions, and possible side effects. Posology. Adults. In uncomplicated Chlamydia trachomatis urethritis and cervicitis the dose is 1000 mg as a single oral dose. For all other indications the dose is 1500 mg, to be administered as 500 mg per day for three consecutive days. Contains Nonbinding Recommendations Draft Guidance on Azithromycin This draft guidance, once finalized, will represent the Food and Drug Administration's (FDA's) ZITHROMAX® (azithromycin) Tablets and Oral Suspension. DESCRIPTION. ZITHROMAX (azithromycin tablets and oral suspension) contains the active ingredient azithromycin, a macrolide antibacterial drug , for oral administration. Azithromycin tablets are macrolide antibacterial drug indicated for the treatment of patients with mild to moderate infections caused by susceptible strains of the designated microorganisms in the specific conditions listed below. Azithromycin comes as a tablet, an extended-release (long-acting) suspension (liquid), and a suspension (liquid) to take by mouth. The tablets and suspension (Zithromax) are usually taken with or without food once a day for 1–5 days.