Lab tests designed to reveal the presence of pathological liver and haemopoietic organ alterations were run in 72 alcohol addicts. It was found that chronic alcoholism is more often accompanied by hypoazotaemia (90.28% of cases), increased globular volume (90.28%), increased IgA (85%), decreased blood transferrin (95.45%), and increase Ig A: blood transferrin ratio (90%) than by other signs. Liver biopsy and sternal puncture, together with gastroendoscopy, showed that these signs are constant and early evidence of initial anatomical and functional damage to the liver and blood production organs due to alcohol.