How can you support someone who is suicidal?

See below. You can watch the person 24/7/365. If the person is suicidal, they need to be evaluated properly -- you can take the person to the nearest emergency room or call 911. Once in the er, s/he will undergo a psych. Eval. You will also need to take care of yourself -- as supporting someone who is suicidal requires a lot of emotional strength. Good luck!
Suicidal. Stay with then until crisis hotline intervenes & advises course of action.