PROBLEM TO BE SOLVED: To provide a water-swellable laminate film to be a gelatinous film having moderate strength by absorbing moisture, and a swallowable substance-coated body coated with a swallowable substance by using this water-swellable laminate film.SOLUTION: At least one face of a film (A) containing 8 to 35 mass% of a pharmaceutically acceptable carboxylate group-containing water-soluble polymer (a1) and 8 to 35 mass% of a pharmaceutically acceptable polyvalent metal compound (a2) having a solubility of 0.1 g/100 g or less in water at 25°C, where particles of the (a2) component are inside present in dispersion state, with a film (B) containing 50 to 95 mass% of a nonionic water-soluble polymer (b1) and 3 to 25 mass% of a pharmaceutically acceptable organic acid (b2) having a molecular weight of 1000 or less, to obtain a water-swellable laminate film. By using this water-swellable laminate film, a swallowable coated body is coated with a swallowable substance.COPYRIGHT: (C)2015,JPO&INPIT【課題】水分を吸収して適度な強度を有するゲル状の膜になる水膨潤性積層フィルム、及びこの水膨潤性積層フィルムを用いて嚥下物を被覆した嚥下物被覆体を提供する。【解決手段】薬学的に許容されるカルボキシレート基含有水溶性ポリマー(a1)8~35質量%と、25℃における水に対する溶解度が0.1g/100g以下の、薬学的に許容される多価金属化合物(a2)8~35質量%とを含有し、内部に前記(a2)成分の粒子が分散状態で存在するフィルム(A)の少なくとも一方の面に、非イオン性水溶性ポリマー(b1)50~95質量%と、分子量が1000以下の薬学的に許容される有機酸(b2)3~25質量%とを含有するフィルム(B)を積層して得られる水膨潤性積層フィルムと、この水膨潤性積層フィルムを用いて嚥下物を被覆した嚥下物被覆体。【選択図】 図1
