Beneficence is action that is done for the benefit of others. Beneficent actions can be taken to help prevent or remove harms or to simply improve the situation of others.
Non-maleficence means to “do no harm.” Physicians must refrain from providing ineffective treatments or acting with malice toward patients. This principle, however, offers little useful guidance to physicians since many beneficial therapies also have serious risks. The pertinent ethical issue is whether the benefits outweigh the burdens.
he doctrine (or principle) of double effect is often invoked to explain the permissibility of an action that causes a serious harm, such as the death of a human being, as a side effect of promoting some good end. It is claimed that sometimes it is permissible to cause such a harm as a side effect (or “double effect”) of bringing about a good result even though it would not be permissible to cause such a harm as a means to bringing about the same good end.
Consequentialism refers to those moral theories which hold that theconsequences of one's conduct are the true basis for any judgment about the morality of that conduct. Thus, from a consequentialist standpoint, a morally right act (or omission) is one that will produce a good outcome, or consequence. This view is often expressed as the aphorism "The ends justify the means".
Consequentialism is usually distinguished from deontological ethics (or deontology), in that deontology derives the rightness or wrongness of one's conduct from the character of the behaviour itself rather than the outcomes of the conduct.
deontologism
1. (ethics) Emphasis on universal imperatives such moral laws, duties, obligations, prohibitions, or imperatives (thus sometimes also called imperativism). Kantianism is the prime example