Dabigatran is a drug that belongs to the class of medicines known as direct thrombin inhibitors. This means that the drug prevents your blood from clotting. This is helpful as clots that can result in serious conditions such as stroke, deep vein thrombosis, and pulmonary embolism. Dabigatran is prescribed to help prevent these conditions, particularly in those patients who already suffer from atrial fibrillation. As it prevents blood from clotting, dabigatran increases the risk of bleeding, even if you only bumped your head quite mildly. Therefore, falls and bumps need to be considered more seriously.