It is a kind of can the taste of completely obscured medicated layer contained drug, stink medicinal preparation for oral administration, in order to reach purpose, medicinal preparation for oral administration 1a is provided, medicinal preparation for oral administration 1a outermost layer is equipped with the 1st water-swellable gel-forming layer 12 and the 2nd water-swellable gel-forming layer 12 ', and the 1st water-swellable gel-forming layer 12 edge part and the 2nd water-swellable gel-forming layer 12 ' edge part tying close so that medicated layer 11 is enclosed inside what medicinal preparation for oral administration 1a.一種可完全遮蔽含藥層所含藥物之味道、臭味的口服藥劑，為了達成目的，提供口服藥劑1a，該口服藥劑1a最外層設有第1水膨潤性凝膠形成層12及第2水膨潤性凝膠形成層12’，且第1水膨潤性凝膠形成層12之邊緣部及第2水膨潤性凝膠形成層12’之邊緣部係結合的，以使含藥層11封入於口服藥劑1a內部。
