compounds of the class of 6 - phenyl - 4h - s - triazolobenzodiazepine - 1 - lower alkanols , and their ethers and esters , 1 -- 6 - phenyl - 4h - s - triazolobenzodiazepines and the 5 - oxides and pharmaceutically acceptable acid addition salts thereof have central depressant properties , in particular antiaggressive and anticonvulsant actions , and are active ingredients for pharmaceutical compositions . specific embodients are 6 - phenyl - 8 - chloro - 4h - s - triazolobenzodiazepine - 1 - methanol and 1 - 6 - phenyl - 8 - chloro - 4h - s - triazolobenzodiazepine .