R. Moshe Feinstein on When We Do and Don't Treat at the End of Life (16 Iyar)
אגרות משה חושן משפט ב:עג 16 Iyar 5742 (1982)
Rav Moshe Feinstein was asked a bunch of questions about tough medical choices--Can we withhold treatment from some patients, to let them pass away without further suffering? Can we "prefer" a patient with hopes of cure to one we're treating palliatively? May a patient refuse care, and if so, when?