Leukeran contains chlorambucil 2 mg per tablet in an oral, prescription-only format. Supplied by Aspen Pharmacare, this product is identified by DIN 00004626 and comes in a 1 x 25-tablet bottle. Intended for use, Leukeran is classified as an immunosuppressant and must be used only under the direction of a licensed healthcare professional. Prescription required in Canada, including Quebec.