Blurry vision, trouble walking, slurred speech, late reactions, and weakened memory; they are all side effects of alcohol. Some of these side effects are visible only after a few drinks. Whereas a person taking alcohol over a long period of time will end up with brain shortfalls even when he is sober. Alcohol has far reaching effects on brain ranging from memory lapses to permanent brain damage that has to be properly treated. Damage done by alcohol depends on number of factors like how often a person takes alcohol, what age group he or she belongs to, what is his or her general health status, what kind of alcohol he or she takes.