Puffiness under the eyes is a common symptom of allergies, lack of sleep, stress, and poor diet. Eyes will become puffy when the skin around the eyes becomes irritated and itchy. People who consume large amounts of alcohol and sodium before bed may wake up with puffy eyes due to water retention.
Alcohol, Benzodiazepines, Barbiturates and other central nervous system depressant drugs act primarily on a neurotransmitter substance known as GABA (Gamma Aminobutyric Acid). GABA is an inhibitory neurotransmitter that makes other neurons less likely to activate.
alcohol is a depressant it effects the central nervous system it is the most widely used drug in the U.S, high physical and psychological dependence. Nicotine. high psychological dependence and physical dependence, its a stimulant, nicotine is found in tobacco.