You have duty to intervene when treatment is contraindicated. Case on point: Wulbrecht v. Jehle, 2010-20229 NYMISC (6/14/2010)-NY.
D006801:Humans; D008318:Malpractice / Q000331:legislation & jurisprudence*; D009518:New York; D009741:Nursing Staff, Hospital / Q000331:legislation & jurisprudence*; D013405:Suicide / Q000331:legislation & jurisprudence*