Management of Dysuria in Adult Males

Initial Assessment and Diagnosis

Dysuria in men is often caused by urinary tract infection (UTI), but in males it should be considered a complicated UTI requiring thorough evaluation, with coliform bacteria (especially E. coli) being the predominant causative organisms in men over 35 years 1
A urine culture and susceptibility testing should be performed before initiating antibiotics to guide appropriate therapy, and to evaluate for signs of systemic infection including fever, rigors, altered mental status, flank pain, or costovertebral angle tenderness 1, 2

Positive nitrite and leukocyte esterase on dipstick suggest bacterial UTI, though negative results don't completely rule it out, and consider potential urological abnormalities that may complicate treatment, including prostatic hyperplasia which is common in men over 40 3, 4
Treatment duration should be extended to 14 days if prostatitis cannot be excluded, and first-line empiric treatment for men with uncomplicated UTI includes trimethoprim-sulfamethoxazole or nitrofurantoin for 7 days, with fluoroquinolones avoided if local resistance rates are ≥10% or the patient has used fluoroquinolones in the past 6 months 1, 2, 5

Calculate creatinine clearance to determine appropriate dosing, especially in patients with reduced renal function, and adjust antibiotic dosing based on renal function to prevent toxicity, with caution when using trimethoprim-sulfamethoxazole in patients taking ACE inhibitors or ARBs due to increased risk of hyperkalemia 6
If symptoms persist after initial treatment, further evaluation is needed for resistant organisms, urological abnormalities requiring management, and non-infectious causes of dysuria, with any underlying urological abnormality managed appropriately 1, 2