470. What is forbidden by the fifth commandment?

The fifth commandment forbids as gravely contrary to the moral law:

• direct and intentional murder and cooperation in it;
• direct abortion, willed as an end or as means, as well as cooperation in it. Attached to this sin is the penalty of excommunication because, from the moment of his or her conception, the human being must be absolutely respected and protected in his or her integrity;
• direct euthanasia which consists in putting an end to the life of the handicapped, the sick, or those near death by an act or by the omission of a required action;
• suicide and voluntary cooperation in it, insofar as it is a grave offense against the just love of God, of self, and of neighbor. One's responsibility may be aggravated by the scandal given; one who is psychologically disturbed or is experiencing grave fear may have diminished responsibility.

Further reading: CCC 2268-2283, 2321-2326


471. What medical procedures are permitted when death is considered imminent?

When death is considered imminent the ordinary care owed to a sick person cannot be legitimately interrupted. However, it is legitimate to use pain-killers which do not aim at in death and to refuse "over-zealous treatment", that is the utilization of disproportionate medical procedures without reasonable hope of a positive outcome.

Further reading: CCC 2278-2279