(Drift) In the specific case you list, I think it would be better that rather than a doc ask "you got GUNS in your house?" formulate the question along the lines of:
This specific medication I want to prescribe for you to treat your condition, is known to have new or increased tendencies toward violence and suicide in certain patients. People who own firearms, operate heavy machinery, or <insert other factors here. i'm not a med pro with the latest list of things that are 'bad for ya'> can have a higher risk of incident. Given that information should I prescribe this medication? Or should we look for alternatives.