Why do energy tablets make me feel like i'm drunk? is this normal?

No, its not.: Energy tablets are essentially caffeine, which is a stimulant, and would not normally make people feel sedated or uncoordinated. Some people with ADHD may react to stimulants, including caffeine, with feeling more calm and focussed, but not drunk. Talk to your health care provider about it. There may be other ingredients in your energy tablets that put you at risk, although generally its vitamins.