You must give a proper history to your doctor before you start taking Thrombiflo 20mg Injection. Inform your doctor if you have a heart valve fitted or have gastric ulcer, high blood pressure, diabetes, or kidney problems. You should also let your doctor know if you ever had a reaction to heparin or had a recent stroke, brain or spinal surgery. The chances of side effects and complications increase in presence of these conditions. Consult with your doctor and follow the instructions strictly.