Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 9/2/2025

STI Treatment Guidelines

Treatment Recommendations

  • The CDC recommends ceftriaxone (125-250 mg IM in a single dose) as the preferred first-line treatment for gonococcal urethritis, cervix, and rectal infections, with ciprofloxacin (500 mg PO in a single dose) as an alternative option, but with caution due to increasing resistance 1, 2
  • The CDC recommends dual therapy with ceftriaxone plus azithromycin for uncomplicated gonococcal infections to address possible chlamydial co-infection and combat antimicrobial resistance 2
  • Azithromycin (1 g PO in a single dose) is a recommended first-line treatment for non-gonococcal urethritis, according to the American College of Obstetricians and Gynecologists 1, 3
  • Doxycycline (100 mg PO twice daily for 7 days) is an alternative first-line treatment for non-gonococcal urethritis, as recommended by the American College of Obstetricians and Gynecologists 1, 3

Antimicrobial Resistance

  • Quinolone-resistant N. gonorrhoeae is increasingly prevalent, limiting ciprofloxacin's utility, as reported by the Journal of Microbiology, Immunology and Infection 1, 2
  • Dual therapy with two antimicrobials with different mechanisms of action is recommended to improve treatment efficacy and potentially delay emergence of resistance, according to the CDC 2

Special Populations

  • Pregnant women should not be treated with quinolones or tetracyclines, as recommended by the American College of Obstetricians and Gynecologists 2, 3
  • Men who have Sex with Men (MSM) should not receive quinolones due to higher prevalence of resistant strains, as reported by the CDC 2

Clinical Decision Algorithm

  • For gonococcal infections, the first choice is ceftriaxone (125-250 mg IM) + azithromycin (1g PO), as recommended by the CDC 2
  • For non-gonococcal urethritis/chlamydial infections, the first choice is azithromycin 1g PO single dose, according to the American College of Obstetricians and Gynecologists 1, 3

REFERENCES

1

guideline on antimicrobial therapy of sexually transmitted diseases in taiwan. [LINK]

Journal of Microbiology, Immunology and Infection, 2010

2

Gonorrhea Treatment Guidelines [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

3

Antibiotic Recommendations for Penile Infections [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025