Zithromax (azithromycin) is an antibiotic used to treat bacterial infections, including gonorrhea and Chlamydia trachomatis. The recommended dose of Zithromax for the treatment of these infections is 1 gram (1000 mg) as a single oral dose. It is important to note that this dosage may be adjusted based on individual patient needs and any underlying health conditions. It's always recommended to consult with a doctor before taking any medication, including Zithromax.