[Chronic pain of cancers. How to update and promote the subcutaneous administration of morphine].

In order to treat the cancer chronic pains, the morphine is the most relevant analgesic, since it has rapid, powerful and multiples possibilities of administration. The subcutaneous Administration should be proposed in case of impossibility to act orally. It is a simple and efficient choice, which requires to be organised outside the specialised centers, i.e. at the patient's home. Today, the arrival of news materials allows a continuous and ambulatory injection linked to a better efficiency and acceptance (less side effects). The "P.C.A. methods" allows self administration, which meets the needs.