A solid dispersion product comprising an effective amount of one or more active ingredients and an effective amount of one or more hydroxypropyl methylcellulose(s), which satisfies the Formula 0.35>；ΔHtr (1) (wherein AHtr represents the endotherm (J/g) accompanying a transition at about 240° C.). The solid dispersion product is used for the manufacture of a dosage form having improved bioavailability of said one or more active ingredients by oral administration to a patient in need thereof.
