What is the recommended treatment for uncomplicated gonorrhea in an adult, including options for pregnancy, ceftriaxone allergy, and co‑infection with chlamydia?

Treatment of Uncomplicated Gonorrhea in Adults

For uncomplicated gonorrhea in adults, treat with ceftriaxone 500 mg intramuscularly as a single dose, plus doxycycline 100 mg orally twice daily for 7 days if chlamydial co-infection has not been excluded. 1

Standard First-Line Treatment

The most recent CDC guidance (2020) updated the recommended regimen to ceftriaxone 500 mg IM as monotherapy for uncomplicated urogenital, anorectal, and pharyngeal gonorrhea 1. This represents an increase from the previous 250 mg dose and eliminates routine dual therapy with azithromycin, which was previously recommended to prevent ceftriaxone resistance but raised antimicrobial stewardship concerns 1.

Key Treatment Points:

• Ceftriaxone 500 mg IM provides sustained bactericidal levels effective at all anatomic sites
• Add doxycycline 100 mg orally twice daily for 7 days if chlamydial infection has not been excluded (co-infection occurs in up to 40% of cases) 2
• Azithromycin 1 g orally can substitute for doxycycline if compliance with 7-day therapy is unlikely, though doxycycline is now preferred given rising azithromycin resistance 3

Special Populations

Pregnancy

Pregnant women should receive ceftriaxone 500 mg IM as the primary treatment 4, 5. Key considerations:

• Do NOT use quinolones or tetracyclines in pregnancy 4, 5
• For chlamydial co-infection: use erythromycin or amoxicillin instead of doxycycline 4
• Ceftriaxone demonstrated 95% efficacy in pregnant women and showed no increased congenital malformations 2
• If cephalosporin cannot be used: spectinomycin 2 g IM is the alternative, though it has only 52% efficacy against pharyngeal infections 4

Severe Cephalosporin Allergy

When ceftriaxone cannot be used due to severe allergy, options are limited:

• Azithromycin 2 g orally as a single dose 3
• Mandatory test-of-cure in 1 week using culture or NAAT 3
• Consider consultation with infectious disease specialist for complex cases 3

Important caveat: The risk of cross-reactivity between penicillins and cephalosporins is often overestimated; ceftriaxone can frequently be used safely in patients with penicillin hypersensitivity 6.

If Ceftriaxone Unavailable

Alternative regimen (though inferior):

• Cefixime 400 mg orally PLUS azithromycin 1 g orally 3
• Mandatory test-of-cure in 1 week 3
• Note: Cefixime has limited efficacy for pharyngeal gonorrhea and CDC no longer recommends it as first-line due to rising resistance 3

Co-infection with Chlamydia

Given the high prevalence of chlamydial co-infection (27-40% of gonorrhea cases) 2:

• Always treat presumptively for chlamydia unless specifically excluded by testing
• Doxycycline 100 mg orally twice daily for 7 days is preferred over azithromycin due to better compliance and lower tetracycline resistance concerns 3
• In pregnancy: substitute with erythromycin or amoxicillin 4

Pharyngeal Gonorrhea Considerations

Pharyngeal infections are more difficult to eradicate and often asymptomatic 4:

• Same regimen: Ceftriaxone 500 mg IM plus doxycycline 3
• Cefixime has poor efficacy (limited data) for pharyngeal sites 3
• Test-of-cure recommended for all pharyngeal infections 7
• Consider pharyngeal testing in all treatment failures, as concurrent pharyngeal infection may be the source 8

Treatment Failure Management

If symptoms persist after recommended treatment:

1. Obtain culture with antimicrobial susceptibility testing 3
2. Consult infectious disease specialist or CDC (404-639-8659) 3
3. Report to local/state health department within 24 hours 3
4. Test-of-cure 1 week after re-treatment 3
5. Evaluate and treat sex partners from preceding 60 days 3

Most post-treatment infections represent reinfection rather than true treatment failure, emphasizing the need for partner treatment 4.

Critical Pitfalls to Avoid

• Do not use quinolones (ciprofloxacin, ofloxacin) as first-line therapy due to widespread resistance, despite older guidelines recommending them 4, 5
• Do not use cefixime as first-line due to rising MICs and poor pharyngeal efficacy 3
• Do not skip chlamydia treatment unless specifically excluded by testing
• Do not use tetracyclines or quinolones in pregnancy 4, 5
• Do not forget test-of-cure when using alternative regimens or treating pharyngeal infections 3, 7