Abstract: A product containing: (a) an immunosuppressant agent (A) and (b) at least one immunosuppressant 2,2′-bi-1H-pyrrole compound (B) having formula (I) wherein R1 is hydrogen, phenyl, C1-C20 alkyl or C2-C20 alkenyl, wherein the alkyl and alkenyl groups are unsubstituted or substituted by 1 to 3 substituents, which are the same or different, chosen independently from halogen, C1-C6 alkoxy, hydroxy, aryl and aryloxy; R2 is hydrogen, C1-C6 alkyl, cyano, carboxy or (C1-C6 alkoxy)carbonyl; R3 is halogen, hydroxy or C1-C11 alkoxy unsubstitued or substituted by phenyl; R4 is hydrogen, C1-C6 alkyl or phenyl; each of R5 and R6, which are the same or different, is independently hydrogen, C2-C20 alkanoyl, C3-C20 alkenoyl, phenyl, C1-C20 alkyl or C2-C20 alkenyl; or two of R4, R5 and R6, taken together, form a C4-C12 polymethylene chain, which is unsubstituted or substituted by a C1-C12 alkyl, by a C2-C12 alkenyl or by a C1-C12 alkylidene group; or a pharmaceutically acceptable salt thereof; as a combined preparation for