Answer:
Alcohol is one the most addictive substance present around us. It directly acts on our brain and stimulates various neurotransmitters. For example, it suppresses glutamate release in our brain which leads to the decrease in energy levels and brain activities.
However, its effects on the dopamine is of at most significance. Effected dopamine causes the person to drink more and more alcohol.
It is because dopamine is the neurotransmitter which controls the reward and pleasure centers in the brain.
Initially alcohol increases the release of dopamine in the brain which gives the feeling of euphoria or joy. However, with time it decreases the dopamine receptors in the brain reduces their activity.
After sometime there comes a stage when a person needs more alcohol uptake in order to feel the same euphoric rush or joy he or she used to get with small amounts of alcohol.