To improve the chemical stability of silodosin to light and suppress the generation amount of degradation products (analogs) derived from drug substance in orally disintegrating tablets or the like containing silodosin.An orally disintegrating tablet or the like containing silodosin and a light shielding agent, wherein the tablet is colored with a color selected from pale yellow, yellow, pale red and red, and the like are provided. The above-mentioned light shielding agent is yellow iron oxide, yellow ferric oxide, brown iron oxide, ferric oxide, food yellow 4, food yellow 5, food yellow 4 aluminum lake, edible red No. 2, food red No. 3, edible It is preferably selected from red No. 102.BACKGROUND OF THE INVENTION【課題】シロドシンを含有する口腔内崩壊錠等について、シロドシンの光に対する化学的な安定性を向上させ、原薬由来の分解産物(類縁体)の発生量を抑制すること。【解決手段】淡黄色、黄色、淡赤色、赤色より選ばれる色で錠剤が着色された、シロドシン及び遮光剤を含有する口腔内崩壊錠等を提供する。前記の遮光剤は黄酸化鉄、黄色三二酸化鉄、褐色酸化鉄、三二酸化鉄、食用黄色4号、食用黄色5号、食用黄色4号アルミニウムレーキ、食用赤色2号、食用赤色3号、食用赤色102号より選ばれることが好ましい。【選択図】図1
