still afraid of their political views. In 1967, an invitation from Austria was also banned. In fact, the young scientist at the time boldly said without hiding the reason: "I am well known in foreign countries, but unfortunately, political circles do not want to let me there." In the article "Study of the hemostatic properties of Ekmolin", published in 1964, the researcher-scientist introduced the use of a new drug in medical science to prevent thromboembolic complications to the wider medical community. Until then, heparin was used in the medical world to prevent thromboembolic complications. In some cases, procaine sulfate was used to remove heparin from the body. Namely, Professor Musa Abdullayev was the first to use ekmolin instead of procaine sulfate. Until then, ekmolin was used by professors Yermolov and Valentinskaya in the treatment of viral influenza. Musa Abdullayev, on the other hand, discovered a new feature of ekmolin to reduce the effects of heparin. According to this discovery, the scientist conducted 32 experiments on 10 dogs. Ekmolin has been shown to act as a procaine sulfate. It is interesting that in 1969, Mustafa Topchubashov, a full member of the USSR Academy of Medical Sciences, world-famous scientist and politician, mentioned the name of his student in the article "Outstanding Surgeon" dedicated to the 60th anniversary of Fuad Efendiyev in the "Communist" newspaper. Musa Abdullayev worked at the Republican Institute of Hematology and Blood Transfusion since 1958; in 1970-79 he was the head of the second department of propaedeutics of internal diseases of the Azerbaijan State Medical Institute. Prominent hematologist Musa Abdullayev, while leading the second department of propaedeutics of internal diseases of the Medical Institute, implemented the method of cordial defibrillation in 1974–75, innovated in the history of medical science in Azerbaijan. Professor Musa Abdullayev wrote the first two-volume English-Azerbaijani medical dictionary in 1979. The incurable blows inflicted on the human destiny by the Stalin regime, the terrible years of exile, from time to time endangered the health of every member of the "Lightning", including Musa Abdullayev. The eminent scientist of his time was such a selfless scientist in the field of medical science that the research work he wrote with his innate thinking is still on the agenda today. Musa Abdullayev laid the foundation of hundreds of scientific theories and textbooks with his articles. The fact that the cold, cruel death did not allow the self-sacrifice of science deprived