[Drugs and acute agranulocytosis: analysis of previous drug intake in 42 patients (author's transl)].

An exact account of previous drug intake was obtained in 42 patients with acute agranulocytosis. Because of the multiplicity of administered drugs, often in the form of multiple-drug preparations, it was possible in only a minority of cases to ascribe with any degree of certainty a causative role to any particular drug. But outstanding as possible causes were thyrostatic drugs and pyrazolone. But no conclusion could be drawn as to the incidence of agranulocytosis with regard to these drugs because of the absence of data on the frequency that they are prescribed and the unknown number of fatal cases of agranulocytosis. The results indicate that multiple drug treatment and in particular the unnecessary prescribing of multiple-drug preparations makes it difficult to ascertain side-effects of drugs. They once again point to the need of frequent checks of white cell count in the drug treatment of pyrexial diseases.