A new study done by the scientists discovered a gene HTR7, which plays a major role in making a person problem- drinker.

A Texas institute identified the serotonin receptor gene called HTR7, which was common in the brains of alcoholics. They also found that the children of problem drinkers had the same patterns of brain activity and therefore, are at the same risk of becoming alcoholics.

 Scientists put more than a 1000 people with generations of problem-drinking in the family on test following which they found a strong link between drinking and the serotonin receptor gene. Serotonin affects mood and sleep and antidepressant drugs often work by regulating it.