Cancer patients in an advanced phase or who are terminally ill generally present with depression, pain, drowsiness, alterations of cognition, anorexia and other symptoms due to the progressive disease. The objective of the medical team of support and palliative care is to control these effects to maintain a quality of life. Particularly, the cancer patient in an advanced phase of the disease presents with important asthenia. In some patients, this asthenia is characterized by drowsiness or apathy. It always leads to ill-being and a sensation of bad adaptation. When an etiologic treatment is possible (correction of the anaemia, of the metabolic disorders, of the undernutrition, of the anorexia, of the insomnia, of the stubborn pain, of the psychological suffering), the asthenia can be fought. But, when it appears in patients not really in the end of life (life expectancy more than 1 month) and when no etiologic treatments are possible, other solutions must be considered, and all the more when the complaint is important with repeated requests for relief.