Add Yahoo as a preferred source to see more of our stories on Google. The term "truth serum" refers to a number of mind-altering drugs. These drugs make you incapable of lying, or so the theory goes.

A GP who gave sleeping pills to a potentially suicidal patient so she could kill herself has been found guilty of misconduct. Dr Iain Kerr, 61, prescribed 30 sodium amytal pills to the former ...