What antibiotic should be given to a patient presenting with hematuria (blood in urine) and dysuria (painful urination)?

Antibiotic Treatment for Hematuria and Dysuria

For a patient presenting with hematuria and dysuria suggestive of uncomplicated lower urinary tract infection (cystitis), prescribe nitrofurantoin 100 mg orally twice daily for 5 days as first-line therapy, or fosfomycin 3 grams as a single oral dose as an equally effective alternative. 1

Clinical Approach

Confirm UTI Diagnosis

• Dysuria combined with hematuria strongly suggests acute cystitis and warrants antibiotic treatment unless urinalysis shows both negative nitrite AND negative leukocyte esterase 2
• Hematuria alone (without dysuria or other urinary symptoms) should prompt evaluation for alternative causes before assuming UTI 2
• In older or frail patients, macroscopic hematuria is listed as a symptom that may warrant antibiotic treatment when combined with other urinary symptoms 2

First-Line Antibiotic Options

Nitrofurantoin:

• 100 mg orally twice daily for 5 days is the preferred first-line agent with minimal gastrointestinal side effects and excellent safety profile 1
• Achieves high urinary concentrations and maintains activity against common uropathogens 3, 4
• Critical pitfall: Never use nitrofurantoin for suspected pyelonephritis (upper UTI with fever, flank pain, costovertebral angle tenderness) as it achieves inadequate tissue concentrations in kidney parenchyma 1

Fosfomycin:

• 3 grams as a single oral dose is an excellent alternative that eliminates adherence concerns 1
• Particularly useful when patient compliance with multi-day regimens is questionable 4
• Same critical limitation: inadequate for pyelonephritis 1

Second-Line Options

If first-line agents are contraindicated or unavailable:

• Trimethoprim-sulfamethoxazole (if local resistance <20%): 3-day regimen more effective than single-dose for uncomplicated cystitis 5
• Fluoroquinolones (ciprofloxacin 250-500 mg twice daily for 3 days): reserve due to resistance concerns and side effect profile 4, 6
• Oral cephalosporins (cephalexin): second-line option with lower efficacy than nitrofurantoin or fosfomycin 4

For Penicillin-Allergic Patients

• The same first-line recommendations apply: nitrofurantoin or fosfomycin are penicillin-free options 1
• Fluoroquinolones (ciprofloxacin or levofloxacin) are alternatives if local resistance <10% 1

When to Escalate Treatment

If patient has signs of pyelonephritis (fever >38°C, flank pain, costovertebral angle tenderness):

• Switch to fluoroquinolones: ciprofloxacin 500-750 mg twice daily for 7 days or levofloxacin 750 mg once daily for 5 days 1
• Alternatively, oral cephalosporins: cefpodoxime 200 mg twice daily for 10 days 1
• Treatment duration for pyelonephritis is 10-14 days, not the shorter courses used for cystitis 5

Special Populations

Older/frail patients:

• Use the same antibiotics and treatment duration as other patient groups unless complicating factors present 2
• Fosfomycin, nitrofurantoin, pivmecillinam, fluoroquinolones, and cotrimoxazole show minimal age-associated resistance 2

Renal impairment:

• Avoid nitrofurantoin if GFR <30 mL/min (inadequate urinary concentrations and risk of peripheral neuropathy) 2
• Adjust fluoroquinolone doses based on creatinine clearance 4

Common Pitfalls to Avoid

• Do not use amoxicillin-clavulanate as first-line for uncomplicated cystitis—it is less effective than nitrofurantoin or fosfomycin and reserved as second-line 4
• Do not assume all hematuria is infectious—sterile pyuria or isolated hematuria without dysuria warrants evaluation for eosinophilic cystitis, stones, or malignancy 7
• Verify local resistance patterns before using trimethoprim-sulfamethoxazole or fluoroquinolones empirically, as resistance rates now exceed 20% in many regions 5, 4, 6
• Never substitute shorter cystitis regimens for pyelonephritis—inadequate treatment of upper tract infections leads to treatment failure and complications 1, 5