It's weird. Years ago I used to be able to have 2-3 drinks and then stop. Actually I was like this for about 6 years. I would have passed the controlled drinking test for 6 years. 3 years of heavy drinking. 2.5 of them being daily drinking. And now I know I'll never be able to pass the drinking test again. Alcohol doesn't just change your brain while it's in your bloodstream... If you are here beginning to question your drinking. Just stop. You won't be able to thank me later if you do this, but if you don't you may be saying "I wish I would have stopped back then, it would have been so easy compared to now.