The present invention concerns stable pharmaceutical compositions for anti-CD19 antibody-drug conjugates, for example for anti-CD19 antibody conjugated, for instance, to a maytansinoid. The invention further relates to medicaments and treatments using the pharmaceutical compositions of the invention. Additionally, the invention relates to a kit comprising at least one of the pharmaceutical compositions of the invention.本發明係關於抗CD19抗體-藥物接合物(例如抗CD19抗體與例如類美登素(maytansinoid)接合)的穩定醫藥組合物。本發明進一步關於使用本發明之醫藥組合物的藥劑及療法。另外,本發明係關於包含本發明醫藥組合物中之至少一者的套組。