I read a posted answer on a old question that was wrong, it was dangerous medical advice. How to correct?

I'm scared someone will think the answer is ok. No one with any medical background responded to the question. Is there a way to add a comment ??I read a posted answer on a old question that was wrong, it was dangerous medical advice. How to correct?
Below the best answer, there is a link to add or read comments. Click on that and add your comments. You can also rate the answer thumbs down.I read a posted answer on a old question that was wrong, it was dangerous medical advice. How to correct?
try to add notes to the same question ... or request the same preson to add answers to that question once again,
I would hope people are not using this sight instead of doctors advice!
Was a best answer already chosen? Did you try to email the person that posted the question, or the person who responded? That's tricky, I'm not sure how to correct and already resolved question.
Why not contact the original asker directly with your advice?
Report it as abuse.