Pharmaceutical compositions containing sulphonic acid derivatives

A naphthalenesulfonic acid or quinolinesulfonic acid of formula (I), wherein A is N or a CR8 formula group, where R8 is H, OH, NR10R11, independently from one another, where R10 and R11 represent H or C1-C6 alkyl or a group of formula NH-CO-R12, where R12 is C1-C6 alkyl or C6-C10 aryl; R1 and R2 represent H or SO3R9, independently from one another, where R9 is H, ammonium or a cation of an alkali or alkaline-earth metal; R3 is H or OH; and R4, R5, R6 and R7 represent H, an NR10R11 or NH-CO-R12 group, independently from one another; on the condition that (i) at least one of R1 or R2 is SO3R9, and (ii) at least one of R4, R5, R6 or R7 is an NR10R11 or NH-CO-R12 group, or their pharmaceutically acceptable salts; and a pharmaceutically acceptable excipient.