Since the topic of suicide seems to be taboo for some people, it continues to be shrouded in secrecy but I don't agree with this concept. I think people who are feeling the urges or thoughts should be able to discuss their feelings and maybe this would make them feel better.
I lost my brother almost 3 yrs ago to suicide and I talk about it, hoping to spare others from going the same route. I also had another brother who was bipolar who would go through stages where he had the urges.
I don't mind helping or talking about it with people. I don't get triggered by it, even though I've been closely affected. I think the best advice is to be prepared and have safety measures handy - this could be your therapist, understanding friend/family member, crisis line, emergency services etc. The next important thing to remember is - be 'patient', 'wait' and have 'faith' those feelings will most definately pass. I believe if we take it out of the closet and learn how to respond, people wouldn't suffer alone and scared. I usually give this very compassionate weblink:
http://www.metanoia.org/suicide/