Everyone's days are numbered. Are yours MORE numbered?

Well, not likely, since most people have been shot, so yours wouldn't be more numbered than theirs, either.

Less sarcasm: If you mean immediate risk, the short-term side effects generally show within a month. If it's been longer, you can probably safely ignore them. That isn't to say you should neglect heart health, it is important at any demographic, but it shouldn't be a pressing stressor on your mind.