Ludwig Heumann & Co. Gmbh

Kurt Wegner

Helmut Schickaneder

Istvan Szelenyi

Kurt H Ahrens

Walter Schunack

Rolf Herter

Stefan Postius

Irene Kramer

1,3,4-Thiadiazole derivatives corresponding to the general formula I ##STR1## which constitute highly effective inhibitors for histamine-H.sub.2 receptors are described. These compounds in addition have a cytoprotective action.

1,3,4-Thiadiazole derivatives and pharmaceutical preparations useful as

3,4-Diazole derivatives corresponding to the general formula I ##STR1## which exert a highly selective action on histamine-H.sub.2 receptors are described. Processes for the preparation of these compounds and pharmaceutical preparations containing these compounds are also described.

3,4-Diazole derivatives and pharmaceutical preparations containing these

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Mainz, Germany

Kurt Wegner