Chlamydia Treatment Guidelines

First-Line Treatment Recommendations

The American College of Physicians recommends treating uncomplicated genital chlamydia in non-pregnant adults with either azithromycin 1 g orally as a single dose or doxycycline 100 mg orally twice daily for 7 days, both having equivalent efficacy of approximately 97-98% 1, 2
Azithromycin 1 g single dose is preferred when compliance with a 7-day regimen is questionable, follow-up is unpredictable, or directly observed therapy is needed, especially in young adults or populations with erratic health-care-seeking behavior 1, 2
Doxycycline 100 mg twice daily for 7 days is preferred when cost is a primary concern, as it is significantly less expensive, and the patient can reliably complete a 7-day course 1, 2

The Centers for Disease Control and Prevention recommend using alternative treatment regimens, such as levofloxacin 500 mg orally once daily for 7 days, ofloxacin 300 mg orally twice daily for 7 days, erythromycin base 500 mg orally four times daily for 7 days, or erythromycin ethylsuccinate 800 mg orally four times daily for 7 days, only when first-line options cannot be used 1, 2
Erythromycin is less efficacious than azithromycin or doxycycline and has frequent gastrointestinal side effects, making it a less desirable choice 1, 2

The American College of Obstetricians and Gynecologists recommends azithromycin 1 g orally as a single dose as the preferred treatment during pregnancy 3
Alternative options include amoxicillin 500 mg orally three times daily for 7 days or erythromycin base 500 mg orally four times daily for 7 days 2, 3
Doxycycline, ofloxacin, and levofloxacin are absolute contraindications in pregnancy due to potential fetal harm 1, 3, 4

For children ≥8 years weighing >45 kg, the recommended treatment is azithromycin 1 g orally as a single dose or doxycycline 100 mg orally twice daily for 7 days 1, 3
For children <45 kg, erythromycin base or ethylsuccinate 50 mg/kg/day orally divided into four doses daily for 14 days is recommended 1, 2, 3

The Centers for Disease Control and Prevention recommend dispensing medications on-site when possible and directly observing the first dose to maximize compliance 1, 2
Patients must abstain from all sexual intercourse for 7 days after initiating treatment and continue abstinence until all sex partners have completed treatment 1, 2, 3
All sex partners from the preceding 60 days must be evaluated, tested, and empirically treated to prevent reinfection 1, 2, 3

The American College of Physicians recommends against routine test-of-cure for non-pregnant patients treated with recommended regimens, as treatment failure rates are extremely low: 0-3% in males, 0-8% in females 1, 2, 3, 4
Test-of-cure is mandatory 3-4 weeks after treatment completion in pregnant patients due to potential maternal and neonatal complications 3
All women with chlamydia should be retested approximately 3 months after treatment, regardless of whether partners were reportedly treated, as reinfection rates can reach 39% in some adolescent populations 1, 2, 3

The Centers for Disease Control and Prevention recommends changing to doxycycline 100 mg orally twice a day for 7 days as the alternative first-line treatment when azithromycin fails 5, 6, 7, 8
Doxycycline has equivalent efficacy to azithromycin (97-98%) in studies where compliance was ensured 7, 8
Ofloxacin 300 mg orally twice a day for 7 days is an alternative option, although it is contraindicated in pregnancy 5, 6, 7, 8
Levofloxacin 500 mg orally once a day for 7 days is another alternative option, also contraindicated in pregnancy 7, 8, 9
Erythromycin base 500 mg orally four times a day for 7 days is less effective and has gastrointestinal side effects that reduce compliance 5, 6, 7, 8

Wait at least 3 weeks after initial treatment before performing confirmation tests, as tests before this time can give false positives due to excretion of dead organisms 5, 6, 7, 9
Nucleic acid amplification tests performed before 3 weeks can detect DNA of dead organisms, not active infection 9

Even if reinfection is ruled out, reverify that all sexual partners from the last 60 days were adequately treated 5, 6, 7, 8, 9
Treat the most recent partner even if the last sexual contact was more than 60 days ago 5, 6, 9

The patient must abstain from sexual intercourse for 7 complete days after starting the new treatment with doxycycline 5, 6, 7, 8
Abstinence must continue until all sexual partners complete their treatment 5, 6, 8

Schedule a new test 3 months after successful treatment, as reinfection rates can reach up to 39% in some populations, especially adolescents 9