Truth serum?

Tweet

Is it true that when drunk you tell the truth? I for myself admit that i love to get drunk and get all tipsy and sing along with my friend. I love loosing my shyness and becomes too talkative but not to aggressive. But never yet did i remember that i told the truth of something that was ask to me. Or a just forgot all about what happened after the next morning? Can you just justify why they say that being drunk from any form of liquor gives you a truth serum effect.