Abstract: The described invention relates to a method of treatment of a pulmonary inflammatory reaction brought about by e.g. bacteraemia, physical trauma or viral infection, with activation of polymorphonuclear white blood cells, said method comprising continuous intravenous infusion of adenosine at a rate effective for such treatment, preferably 2 to 50 .mu.g/ml/min, more preferably 5-20 .mu.g/kg/min in a central vein.