Algorithm for Treating STIs in Men
Men with suspected urethritis should receive empiric treatment with azithromycin 1 g orally as a single dose OR doxycycline 100 mg orally twice daily for 7 days immediately after testing, without waiting for results. 1
Initial Assessment and Diagnosis
When evaluating men for STIs, look for these specific objective findings:
- Urethral discharge (mucopurulent or purulent)
- Gram stain showing ≥5 WBC per oil immersion field
- Positive leukocyte esterase test on first-void urine
- ≥10 WBC per high-power field on microscopic examination of first-void urine sediment 1
If none of these criteria are present, empiric treatment is only recommended for high-risk men unlikely to return for follow-up. 1
Testing Strategy
All men with confirmed or suspected urethritis must be tested for:
- Gonorrhea (using NAAT)
- Chlamydia (using NAAT - strongly recommended due to high sensitivity/specificity)
- Syphilis and HIV (all patients with new STD diagnosis) 1
For rectal symptoms in men who have sex with men, obtain rectal swabs for CT/NG testing, as anorectal infections frequently exceed urogenital prevalence and are often asymptomatic. 2
Treatment Algorithm
First-Line Treatment for Urethritis
Recommended regimens (choose one):
- Azithromycin 1 g orally single dose (preferred for M. genitalium)
- Doxycycline 100 mg orally twice daily for 7 days 1
Alternative regimens (if first-line contraindicated):
- Erythromycin base 500 mg orally four times daily for 7 days
- Erythromycin ethylsuccinate 800 mg orally four times daily for 7 days
- Levofloxacin 500 mg orally once daily for 7 days
- Ofloxacin 300 mg orally twice daily for 7 days 1
Critical Treatment Principles
- Dispense medications on-site and directly observe the first dose to maximize compliance 1
- Treat for both gonorrhea and chlamydia when clinic-based diagnostics (Gram stain) are unavailable 1
- Instruct sexual abstinence for 7 days after single-dose therapy or until completion of 7-day regimen AND until all partners are treated 1
Persistent or Recurrent Urethritis
Only retreat if objective signs of urethritis are present - symptoms alone without documented inflammation are insufficient for retreatment. 1
If compliant with initial treatment and re-exposure excluded:
- Test for Trichomonas vaginalis (urethral swab, first-void urine, or semen)
- Consider doxycycline-resistant U. urealyticum or M. genitalium 1
Recommended regimen for persistent urethritis:
- Metronidazole 2 g orally single dose (while awaiting diagnostic results) 1
Follow-Up Protocol
Test-of-Cure
NOT recommended at 3-4 weeks for documented chlamydia/gonorrhea treated with recommended regimens, unless:
- Symptoms persist
- Therapeutic noncompliance suspected
- Reinfection suspected 1
Reinfection Screening
Repeat testing at 3-6 months is mandatory for all men diagnosed with chlamydia or gonorrhea due to high reinfection rates, regardless of partner treatment status. 1
Partner Management
All sex partners within preceding 60 days must be:
- Referred for evaluation and testing
- Treated empirically with chlamydia-effective regimen
- Consider expedited partner treatment or patient referral as alternatives 1
This applies even for nonchlamydial NGU, as female partners frequently harbor chlamydia. 1
Common Pitfalls to Avoid
- Do not retreat based on symptoms alone without objective evidence of inflammation 1
- Do not use fluoroquinolones for gonorrhea due to widespread resistance 3
- Do not delay treatment waiting for test results in symptomatic patients 1
- Watch for chronic prostatitis/chronic pelvic pain syndrome in men with persistent perineal, penile, or pelvic pain lasting >3 months 1