Abstract
The standard version of the doctrine of double effect, a significant doctrine in
applied ethics particularly medical ethics, not only fails to capture some morally significant
components of Aquinas’ view, but it does not resort to proper complementary features
in order to accommodate the doctrine to our moral intuitions. We attempt to offer a new
formulation of the doctrine incorporating the main components of Aquinas’ view and also
to extend the view using some complementary features. We will examine the strength of
the formulation applying it into some ethically controversial situations, mainly in medical
ethics.