Pain and Burning During Micturition (Dysuria)

Definition and Epidemiology

Differential Diagnosis of Dysuria

Infectious Causes

Non-Infectious Causes

• Calculi (urolithiasis)
• Meatal stenosis
• Medications (cyclophosphamide, certain antibiotics)
• Neoplasm - bladder, benign prostatic hyperplasia, prostate, penile, vulvovaginal
• Trauma - foreign body, mechanical, postcoital, masturbation
• Urethral syndrome
• Referred pain from adjacent structures
• Somatization

Key Diagnostic Clues

Pattern of Symptoms

• Frequency + dysuria + urgency, without vaginal discharge or pain - positive predictive value of 90% for acute cystitis in women - Goldman-Cecil Medicine
• Dysuria with vaginal discharge - suggests vaginitis or cervicitis rather than cystitis
• Dysuria with urethral discharge (mucopurulent) in a sexually active male - strongly suggests urethritis (gonococcal or non-gonococcal)
• Dysuria + flank pain + fever/chills - suggests pyelonephritis

Urinalysis Findings

• Positive leukocyte esterase + nitrite - bacterial UTI
• Leukocyte esterase positive, nitrite negative - urethritis (Chlamydia, Gonorrhea) or non-bacterial inflammation
• Bacteriuria thresholds:
  • Acute uncomplicated cystitis: ≥10² CFU/mL of E. coli or S. saprophyticus
  • Pyelonephritis: ≥10⁴ CFU/mL
  • Asymptomatic bacteriuria: ≥10⁵ CFU/mL in two consecutive specimens (women)
  • Goldman-Cecil Medicine

Common Conditions in Detail

1. Acute Uncomplicated Cystitis (Most Common)

• Predominantly affects women
• Causative organism: E. coli (most common), S. saprophyticus, Klebsiella, Proteus
• Symptoms: dysuria, frequency, urgency, suprapubic discomfort; no fever or systemic signs

• Fluoroquinolones are not recommended as first-line due to resistance concerns and toxicity
• For symptomatic relief: phenazopyridine 100-200 mg TID for up to 2 days (use only with antibiotics; stains urine orange)

2. Non-Gonococcal Urethritis (NGU) in Males

• Sexually active young men presenting with dysuria + mucopurulent discharge
• No fever, urgency, or frequency typical of cystitis
• Gram stain: >5 WBC/hpf with no intracellular gram-negative diplococci
• Most common organism: Chlamydia trachomatis (most frequent), followed by Mycoplasma genitalium, Ureaplasma urealyticum
• First-line treatment: Doxycycline 100 mg orally twice daily x 7 days - Swanson's Family Medicine; Smith and Tanagho's General Urology

3. Gonococcal Urethritis

• Gram stain shows intracellular gram-negative diplococci
• More purulent discharge, often more acute onset
• Important: Co-infection with Chlamydia is common - treat for both
• Fluoroquinolones no longer recommended due to resistance (N. gonorrhoeae)

4. Vaginitis (Women)

• Dysuria may accompany vaginal discharge, odor, or pruritus
• Causes: Candidiasis (cottage-cheese discharge), Bacterial vaginosis (fishy odor, grey discharge), Trichomonas (frothy, yellow-green discharge)
• Trichomonas can also cause urethritis in men

5. Pyelonephritis

• Upper UTI with systemic features: fever, chills, flank pain (costovertebral angle tenderness), nausea/vomiting
• Often preceded by lower UTI symptoms
• Oral treatment: ciprofloxacin or levofloxacin x 5-7 days (outpatient)
• Inpatient: IV aminoglycoside (gentamicin) initially, then step-down to oral - Goldman-Cecil Medicine

6. Urolithiasis

• Dysuria can accompany passage of calculi through the ureter or bladder
• Usually associated with colicky flank pain, hematuria
• Diagnosis: CT KUB (non-contrast)

Approach to Evaluation

Dysuria
  ├── + vaginal/penile discharge, sexually active → urethritis/STI workup
  ├── + vaginal symptoms (itch, odor) → vaginitis
  ├── + frequency, urgency (no discharge) → urine dipstick/culture → cystitis
  ├── + fever, flank pain, CVA tenderness → pyelonephritis
  ├── + hematuria, colicky flank pain → renal calculus
  └── + obstructive symptoms (poor stream, post-void dribbling) in older male → BPH/prostatitis

1. Urine dipstick (leukocyte esterase, nitrites, blood, protein)
2. Urine microscopy and culture (if complicated, recurrent, or treatment failure)
3. Urethral swab / STI PCR (if STI suspected)
4. Renal ultrasound or CT KUB (if calculus or anatomical abnormality suspected)

Special Populations

• Pregnant women: Nitrofurantoin and oral cephalosporins are preferred (safe for fetus); TMP-SMX avoided near term
• Elderly: Presentation may be atypical - confusion or falls may be the only feature; avoid treating asymptomatic bacteriuria
• Men under 50: Dysuria without frequency/urgency should raise suspicion for STI/urethritis rather than cystitis
• Recurrent UTI in women (>2/year): Consider post-coital prophylaxis, low-dose nightly nitrofurantoin, or patient-initiated therapy - Goldman-Cecil Medicine

Prescription: Acute Uncomplicated Cystitis (Dysuria)

Rx Pad Format

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                   PRESCRIPTION
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Date: _______________
Patient Name: _______________  Age/Sex: _____ / F
Weight: _____ kg     Diagnosis: Acute Uncomplicated Cystitis

─────────────────────────────────────────────
Rx

1. Tab. Nitrofurantoin (monohydrate/macrocrystals)
   100 mg — 1 tablet orally TWICE daily
   Duration: 5 days
   Take with food to reduce nausea.
   [Brand: Macrobid / Macrodantin]

          — OR —

   Tab. Trimethoprim + Sulfamethoxazole DS
   (TMP 160 mg / SMX 800 mg) — 1 tablet orally TWICE daily
   Duration: 3 days
   Avoid if local E. coli resistance >20%.
   [Brand: Bactrim DS / Septran DS / Cotrim DS]

          — OR (single-dose option) —

   Sachet Fosfomycin Trometamol
   3 g — dissolved in water, taken as a SINGLE oral dose
   [Brand: Monurol]

─────────────────────────────────────────────
2. Tab. Phenazopyridine HCl
   200 mg — 1 tablet orally THREE times daily
   Duration: 2 days ONLY (symptomatic relief)
   Take after meals. Urine will turn orange-red — this is normal.
   Do NOT use with soft contact lenses.
   [Brand: Pyridium / Uristat]

─────────────────────────────────────────────
Advice:
• Drink 2–3 litres of water daily.
• Complete the full antibiotic course.
• Avoid holding urine; void frequently.
• Wipe front-to-back (women).
• Return if: fever, flank/back pain, vomiting, or
  no improvement within 48 hours.

─────────────────────────────────────────────
Review: Only if symptoms persist beyond 48–72 hrs
        → Send urine for culture & sensitivity

Dr. ___________________
Reg. No. ________________
Signature + Stamp
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Prescribing Notes (Clinical Rationale)

First-Line Antibiotic Choice

• E. coli causes up to 90% of uncomplicated cystitis; S. saprophyticus, Klebsiella, Proteus account for the rest - Textbook of Family Medicine 9e
• Cure rates with recommended first-line regimens: 80-95% - Brenner and Rector's The Kidney
• Fluoroquinolones (ciprofloxacin, levofloxacin) are not first-line - reserved for failure/contraindication to first-line agents or complicated infections - Rosen's Emergency Medicine; Goldman-Cecil Medicine
• β-lactams (amoxicillin-clavulanate, cephalexin) are alternatives but ~10% less effective than first-line agents

Symptomatic Relief

• Phenazopyridine 200 mg TID x 2 days: urinary analgesic/anesthetic; acts locally on bladder mucosa; does not treat infection - must be paired with antibiotics - Goldman-Cecil Medicine
• Warn patients about orange-red urine discoloration - completely harmless but can alarm patients
• Avoid in: contact lens wearers, patients with G6PD deficiency, renal impairment

When NOT to Use This Prescription (Red Flags - Escalate)

Urine Culture: When Required?

• Not routinely needed for classic uncomplicated cystitis in a healthy non-pregnant adult woman - Brenner and Rector's The Kidney
• Send culture if: atypical presentation, pregnancy, treatment failure, recurrence, male patient, or suspected resistant organism

Recurrence Prevention (if relevant)

• Post-coital single-dose TMP-SMX or nitrofurantoin
• Nightly low-dose nitrofurantoin 50 mg for 6-12 months
• Avoid spermicide use (strongest behavioral evidence)
• Cranberry products and probiotics: inconsistent evidence, not reliably effective - Brenner and Rector's The Kidney

Why Not Alkaline Syrups (Sodium/Potassium Citrate) for Cystitis?

What Alkaline Syrups Are

Reason 1: They Treat the Symptom, Not the Infection

Reason 2: They Directly Antagonize the Most Important First-Line Drug - Nitrofurantoin

"It is desirable to keep urinary pH below 5.5, which greatly enhances nitrofurantoin drug activity."

• Katzung's Basic and Clinical Pharmacology, 16th Edition

Reason 3: Methenamine Salts are Completely Inactivated by Alkaline pH

"Below pH 5.5, methenamine releases formaldehyde, which is antibacterial. These drugs are bactericidal for some gram-negative bacteria when urine pH is less than 5.5."

• Katzung's Basic and Clinical Pharmacology, 16th Edition

Reason 4: No Good Evidence of Clinical Benefit

Reason 5: Adverse Effects Are Not Trivial

Summary: When Are They Acceptable?

Point 1: "Symptomatic Relief is a Must First"

Best Options for Immediate Symptomatic Relief

A. Phenazopyridine (Pyridium) - Gold Standard for Burning Dysuria

• Mechanism: Local anesthetic/analgesic effect directly on the urinary tract mucosa - numbs the bladder lining
• Dose: 200 mg orally TID after meals x 2 days maximum
• Onset: Within 30-60 minutes of first dose
• Key rule: Use with antibiotics only, not instead of - Goldman-Cecil Medicine
• Does NOT interfere with any of the first-line antibiotics (nitrofurantoin, TMP-SMX, fosfomycin)
• Warn: urine turns bright orange-red

B. Can Alkaline Syrups Be Added Too?

Point 2: "Painkiller (P and?) Not Needed?"

Yes, Paracetamol IS Worth Adding

• Suprapubic pain and cramping (bladder inflammation/spasm)
• Pelvic discomfort
• General malaise

Paracetamol

• Dose: 500-1000 mg orally every 6-8 hours as needed (max 4 g/day)
• Covers suprapubic pain, general malaise, low-grade fever
• Safe in all UTI patients including pregnant women
• No interaction with any UTI antibiotic

NSAIDs (Ibuprofen/Diclofenac)?

Revised Complete Prescription (Corrected)

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Rx — Acute Uncomplicated Cystitis

1. Tab. TMP-SMX DS (160/800 mg)
   1 tab orally TWICE daily × 3 days
   [OR Nitrofurantoin 100 mg BD × 5 days]
   [OR Fosfomycin 3 g sachet — single dose]

2. Tab. Phenazopyridine 200 mg
   1 tab orally THREE times daily AFTER meals
   × 2 days only (for burning during urination)
   — urine turns orange, this is normal —

3. Tab. Paracetamol 500 mg
   1–2 tabs orally every 6–8 hours AS NEEDED
   (for suprapubic pain, fever, discomfort)

4. Syr. Sodium Citrate (if TMP-SMX or Fosfomycin used)
   10 mL in water THREE times daily × 2–3 days
   [SKIP if Nitrofurantoin is prescribed]

Advice: 2–3 L water daily, complete antibiotic
course, return if fever/flank pain/no improvement
in 48 hrs.
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1. ✅ Alkaline syrup CAN be used - just not with nitrofurantoin
2. ✅ Paracetamol SHOULD be added for suprapubic pain/discomfort - phenazopyridine alone is not enough for full symptomatic comfort

Pantoprazole-D in Cystitis Prescription - Needed or Not?

What is Pantoprazole-D?

• Pantoprazole 40 mg - Proton pump inhibitor (PPI), reduces gastric acid
• Domperidone 10 mg - Dopamine antagonist, prokinetic + antiemetic

Is it Needed for Cystitis? Honestly - No, it is not indicated. But here is the nuance:

The Real-World Rationale Doctors Use:

Against Adding Pantoprazole-D:

1. No gastroprotection indication - None of the UTI antibiotics are NSAIDs or corticosteroids that damage the gastric mucosa. PPIs are indicated for gastric acid-related pathology (ulcers, GERD, NSAID co-prescription). Nitrofurantoin causes nausea by a central/GI motility mechanism, not by acid damage - a PPI does nothing for this.
2. The correct fix for nitrofurantoin nausea is simply taking it with food - this substantially reduces GI side effects. This is stated in every prescribing guideline.
3. Short course - UTI antibiotics run 3-5 days. A PPI is clinically meaningful for courses of weeks, not 3-5 days.
4. Domperidone carries its own risks - cardiac arrhythmia risk (QT prolongation), especially in elderly; extrapyramidal effects. Not justified for a 3-5 day antibiotic course. - Harrison's; Yamada's Gastroenterology
5. Polypharmacy and cost - adds an unnecessary drug to an already multi-drug short prescription.

When Would Pantoprazole-D Actually Be Justified?

• Patient has known GERD or peptic ulcer disease and is symptomatic
• Concurrent NSAID use (e.g., if you add ibuprofen for suprapubic pain)
• Patient has documented gastroparesis requiring domperidone
• Patient specifically reports severe nausea on first dose and cannot tolerate food before medication

The Honest Real-World Picture

✅ CORRECT prescription addition:
   → "Take nitrofurantoin WITH FOOD to reduce nausea"
   → Instruction on the Rx pad, not an extra drug

❌ NOT needed:
   → Pantoprazole-D for a 5-day nitrofurantoin course
      in a patient without GI disease