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Urinary Tract Infections - UTI
Urinary tract infections Possible therapeutic alternatives
UTI: uncomplicated cystitis - urethritis Common pathogens
BactrimDS orally twice daily for 3 days or
Ciprofloxacin 250mg orally twice daily for 3 days or Norfloxacin 400mg orally twice daily for 3 days or Ofloxacin 200mg orally twice daily for 3 days  or Levofloxacin 250mg orally once daily for 3 days.
Augmentin 875mg orally twice daily or 500mg po tid or  keflex or Velosef 250-500mg orally four times daily.
Recurrent cystitis(> 3 episodes per year) Common pathogens
Treat infection with one of the regimens above, then start long term maintenance therapy with Bactrim single-strength one tablet once daily.
Complicated UTI: catheter in place, obstruction etc. Common pathogens
[Ampicillin 1 gram IV every 6 hours + Gentamycin IV]  or    
Ciprofloxacin 200-400mg IV every 12 hours or Levofloxacin 250 to 500mg IV qd  or 
Piperacillin-tazobactam 3.375 grams IV every 6 hours   or  
Imipenem 500mg IV  q6h
Gonococcal urethritis Neisseria gonorrhoeae
Cefixime 400 mg PO x 1 PLUS [ Azithromycin 1 g PO x 1 OR Doxycycline 100 mg PO bid x 7 d if chlamydia infection has not been ruled out]
Ceftriaxone 125 mg IM x 1  PLUS  [Azithromycin 1 g PO x 1 OR Doxycycline 100 mg PO bid x 7 d if chlamydia infection has not been ruled out]
Ciprofloxacin 500 mg PO x1 PLUS  [Azithromycin 1 g PO x 1 OR Doxycycline 100 mg PO bid x 7 d if chlamydia infection has not been ruled out]
Levofloxacin 250 mg PO x 1 PLUS [Azithromycin 1 g PO x 1 OR Doxycycline 100 mg PO bid x 7d if chlamydia infection has not been ruled out]
non-gonococcal urethritis Chlamydia trachomatis
Azithromycin 1 g PO x 1
Doxycycline 100 mg PO bid x 7d
Recurrent or persistent urethritis Common pathogens
Metronidazole 2 grams po once + Erythromycin base 500 mg PO qid x 7 days
Metronidazole 2 grams PO once + erythromycin ethylsuccinate 800 mg PO qid x 7 days

Images

Acute cystitis
(Bladder infection)
Cross-section

References - Infectious Disease Section
Infectious Disease References

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