What gastrointestinal adverse effects have been reported with aceclofenac?

Reported gastrointestinal effects of aceclofenac include nausea, vomiting, diarrhoea, flatulence, constipation, dyspepsia, abdominal pain, mouth ulceration, stomatitis (including ulcerative), melaena, haematemesis, worsened colitis or Crohn’s disease, less frequent gastritis, very rare pancreatitis, and gastrointestinal ulcers, perforation or bleeding, sometimes fatal, especially in elderly patients.