Alcohol has immediate short term effects on one's body which includes the brain,pancreas,heart and gut yet the most immediate effect is on the brain. The effects of alcohol on one's brain is usually felt within 5 minutes of the alcohol once swallowed. It usually blocks or slows down the function of the brain causing the drinker to be excited or be relaxed. Some of the effects include loss of balance,drowsiness,slurred speech and nausea and vomiting.