Thieno[1,5]benzodiazepines having useful CNS activity containing the novel tricyclic ring system: ##STR1## the 10-position being substituted by an amino, preferably a piperazino, group.
Thieno[1,5]benzodiazepines having useful CNS activity containing the novel tricyclic ring system: ##STR1## the 10-position being substituted by an amino, preferably a piperazino, group.