Crystalline solid state form of the benzene sulphonic acid salt of 2-[(4S)-6-(4-chlorophenyl)-1-methyl-8-(methyloxy)-4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepin-4-yl]-N-ethylacetamide
The present invention relates to a salt form of a benzodiazepine derivative, in particular crystalline solid state forms, to pharmaceutical compositions comprising the same and to its use in therapy.