There’s a cure for that in .45 caliber.
Better cure is the old soviet trick - tell the guy he’s free to go - it will be a nice spring day flowers blooming, he can see as he is led past a large window toward the next room where he will be given a nice ser of cloths to wear. The next room has an open door at the end and the fresh scents blowing in on the gentle wind ... except for the faint brownish stains on the walls.
As the prisoner is dressed in his new cloths and happily begins to walk toward the open door the man behind him blows his brains out spattering the wall with more soon to be brownish stains ...