A novel device, method and kit for reconstitution of a solid or semi-solid pharmaceutical composition by a negative pressure differential includes (i) a first adapter with a first connector, a first peripheral wall wherein the first adapter is coupled to the first vial by means of a first connector; (ii) a second adapter with a second connector, a second peripheral wall wherein the second adapter is coupled to the second vial by means of a second connector; (iii) a transfer port wherein the transfer port includes a first end ending in first adapter to gain access to first vial and a second end ending in second adapter to gain access to second vial; wherein the first adapters and the second adapter are joined together in vertical direction by means of horizontal wall; wherein the adapter connected to the vials by means of the ends.