Should a medical background check be required for purchasing firearms?

Now,it's a simple form inwhich the buyer provides the answers;should a persons medical history be open to investigation if they want to purchase a firearm?
Will require the loss of civil liberties as well as violating a persons right to privacy(actual arguement for Roe V.Wade)
Update: as to why:
common thread among recent shooters is that they were off their meds.If they're on meds for a mental disorder,should that be disclosed by someone other than the potential buyer of the weapon.
Update 2: several of my cyber-friends have answered so far;question and the answers point out the conundrum.With our freedoms there is no easy solution.
It's a sad event when the future of our country are shot down and killed,I wish I/we knew the answer.
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