A diclofenac-containing patch package product, in which a diclofenac-containing patch, including an adhesive layer containing diclofenac sodium as a drug and dimethyl sulfoxide as a solvent, and a backing layer, is sealed in a packaging bag,



the packaging bag being formed of a laminate at least comprising:
an innermost layer composed of at least one selected from the group consisting of polyethylene terephthalate and cycloolefin polymer;
an oxygen barrier layer arranged outside the innermost layer; and
an outer layer arranged outside the oxygen barrier layer.