Do not use Dynastat if you currently have a gastric or intestinal ulcer or gastrointestinal bleeding If you are taking acetylsalicylic acid or other NSAIDs (e. g. ibuprofen) If you smoke If you have diabetes If you have angina, blood clots, raised blood pressure or raised cholesterol If you are taking anti-platelet therapies (e. g. acetylsalicylic acid) If you have fluid retention (oedema) If you have liver or kidney disease.