[Complications in drug prevention of thromboembolism].

The possibility of complications during the thrombembolic prophylaxis with heparin-dihydroergotamine requests the observance of the application and the contraindications. The information of the patients and the continuous clinical control are absolutely necessary. The thrombembolic prophylaxis with less risk is given in a sufficient medication with Heparin in connection with early active exercising and correct positioning of the patient.