AANP Family Nurse Practitioner (FNP) Certification ExamPlanMedium
A 32-year-old female presents with symptoms consistent with a urinary tract infection (UTI). She reports dysuria, frequency, and urgency. She has no known drug allergies and no history of recent UTIs. A urine dipstick is positive for nitrites and leukocyte esterase. Which of the following is the most appropriate first-line pharmacological treatment?
- ACiprofloxacin 500 mg BID for 7 days
- BTrimethoprim-sulfamethoxazole (TMP-SMX) DS BID for 3 days
- CLevofloxacin 250 mg daily for 5 days
- DAmoxicillin-clavulanate 875/125 mg BID for 7 days
Show answer & explanationAnswer & explanation
Correct answer: B. Trimethoprim-sulfamethoxazole (TMP-SMX) DS BID for 3 days
For uncomplicated UTIs, trimethoprim-sulfamethoxazole (TMP-SMX) is a first-line agent, especially when local resistance rates are low. A 3-day course is typically sufficient for uncomplicated cystitis. Fluoroquinolones like ciprofloxacin and levofloxacin are generally reserved for more complicated UTIs or when first-line agents cannot be used due to resistance or allergies.
Why the other options are wrong
- A. Ciprofloxacin is a fluoroquinolone, which is typically reserved as a second-line agent for uncomplicated UTIs due to concerns about increasing antibiotic resistance and potential side effects.
- C. Levofloxacin is also a fluoroquinolone and is generally not recommended as first-line for uncomplicated UTIs.
- D. Amoxicillin-clavulanate is less effective than other first-line options for uncomplicated UTIs and is generally reserved for specific situations or when other agents are contraindicated.
Uncomplicated UTI First-Line Tx
For uncomplicated urinary tract infections, certain antibiotics are preferred as first-line due to efficacy, safety, and resistance patterns.
- TMP-SMX is a common first-line agent for uncomplicated UTIs.
- Nitrofurantoin is another first-line option for uncomplicated UTIs.
- Fluoroquinolones are generally reserved for second-line treatment due to resistance concerns.
Memory trick: Treat Uncomplicated UTIs with TNT: Trimethoprim, Nitrofurantoin, or Cephalexin!