Alcohol consumption is a major risk factor for numerous systemic diseases, affecting various organs and systems in the body. The World Health Organization (WHO) identifies alcohol consumption as a high-risk factor for diseases such as ischemic heart disease and diabetes. The impact of alcohol is influenced by both the amount and patterns of drinking, with heavy and binge drinking contributing significantly to disease burden. Alcohol affects the immune system, increasing susceptibility to infectious diseases such as tuberculosis, HIV, and pneumonia. It is also classified as a carcinogen by the International Agency for Research on Cancer, linked to cancers of the oral cavity, pharynx, larynx, esophagus, liver, colorectum, and female breast. Chronic alcohol consumption leads to liver diseases like cirrhosis and pancreatitis. The relationship between alcohol and diabetes is complex; moderate consumption may reduce the risk of type 2 diabetes by improving insulin sensitivity, but excessive drinking increases the risk. Neuropsychiatric disorders, including alcohol dependence and epilepsy, are also significantly impacted by alcohol use. Alcohol’s detrimental effects on cardiovascular health include hypertension and atrial fibrillation, with irregular heavy drinking episodes nullifying any protective effects. Social harms from alcohol consumption include family violence, unemployment, and criminal activities, further emphasizing the need for effective prevention and intervention strategies to mitigate the health and social costs associated with alcohol use.