The authors compare the efficacy of epidural morphine analgesia with continuous intercostal extrapleural block using bupivacaine 0.5% after thoracotomy. They affirm that antalgic treatment in thoracotomised patients is the most important factor in preventing the onset of major complications that may negatively influence the results of surgery. The efficacy of the analgesic techniques examined was evaluated using El-Baz's visual analogic scale of pain, through the analysis of spirometric values and on the incidence of postoperative complications. The authors demonstrate that the extrapleural continuous nerve block is a reliable method of post-thoracotomic analgesia.