Alcohol is a colorless, bitter liquid that is consumed as a beverage or medicine. It is produced through the fermentation of grains, grapes, or other fruits. Excessive drinking of alcohol can lead to alcoholism and cause serious short-term and long-term damage to the body. Short-term effects include intoxication and hangovers, while long-term effects involve conditions like cirrhosis, fatty liver, and brain damage. The amount of alcohol in the bloodstream and various personal factors influence how intoxicated a person becomes.