CONOR CAFFREY / SCIENCE PHOTO LIBRARY CONOR CAFFREY / SCIENCE PHOTO LIBRARY
Alcohol consumption. Elderly man drinking a glass of alcohol. Alcohol is an addictive substance which acts as a depressant on the nervous system, and so reduces anxiety, tension and inhibitions. Dependency on alcohol (alcoholism) is an illness which leads to with- drawal symptoms when drinking is suddenly stopped. Long term and excessive alcohol consumption may cause irreversible damage to the heart, liver, brain and nervous system.
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