The present invention provides a pharmaceutical composition for treatment or prevention of thrombosis or embolism or a sequela thereof, comprising a particular TAFIa inhibitor and a plasminogen activator, the TAFIa inhibitor being administered in combination with the plasminogen activator, and a method for treating or preventing thrombosis or embolism or a sequela thereof, comprising administering a particular TAFIa inhibitor in combination with a plasminogen activator to a warm-blooded animal.