We report a case of acute respiratory distress syndrome (RDS) in a pat
ient treated with Atenolol (Tenormin) for two months. According to the
different criteria which are generally used, the diagnosis of pulmona
ry oedema induced by Atenolol was made. There were extra pulmonary cli
nical signs (cutaneous and articular) which were associated with blood
hypereosinophilia and were suggesting the mechanism of RDS was hypers
ensitivity.