Whether it's beer, wine or liquor, the alcohol is molecularly identical and affects your brain the same way. Tequila is distilled from sugars of the agave plant. The distillation process gives it a different makeup of congeners than other alcohols, which really only affect the alcohol's taste.
Whether you drink liquor or beer, drinking too much alcohol is dangerous. Stronger effects: It takes much less hard liquor to cause the same effects as a mug of beer or glass of wine, leading to intoxication far quicker. Multiple shots: People tend to down spirits more quickly — especially in shot form.