When is it justifiable to discontinue life-sustaining treatments?

If the patient has the ability to make decisions, fully understands the consequences of their decision, and states they no longer want a treatment, it is justifiable to withdraw the treatment.
Treatment withdrawal is also justifiable if the treatment no longer offers benefit to the patient.

If the patient has the ability to make decisions, fully understands the consequences of their decision, and states they no longer want a treatment, it is justifiable to withdraw the treatment.
Treatment withdrawal is also justifiable if the treatment no longer offers benefit to the patient.