A 24-year-old woman from Mumbai presents with mucopurulent cervical discharge, dysuria, and lower abdominal pain for 10 days. She had unprotected intercourse 2 weeks ago. On speculum examination, the cervix is inflamed with a mucopurulent exudate. Gram stain of the cervical swab shows no gram-negative diplococci, but nucleic acid amplification test (NAAT) for *Chlamydia trachomatis* is positive. Gonorrhea NAAT is negative. What is the most appropriate treatment?