Diclofenac Side Effects, How it Works, Upsides & Downsides

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Diclofenac Side Effects. Severity: Major. You should check with your doctor immediately if any of these side effects occur when taking diclofenac:

  • Abdominal or stomach bloating, burning, cramping, or pain
  • belching
  • bloody or black, tarry stools
  • cloudy urine
  • constipation
  • decrease in urine output or decrease in urine-concentrating ability
  • diarrhea
  • dizziness
  • feeling of indigestion
  • headache
  • increased bleeding time
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