PROBLEM TO BE SOLVED: To provide tablets used for the treatment of voiding dysfunction associated with prostatic hyperplasia, in which the chemical stability to the light of silodosin is improved.SOLUTION: The present invention provides an orally disintegrating tablet which is colored in a color selected from light yellow, yellow, pale red, red, and which contains silodosin and a light screening agent. Preferably, the light screening agent is selected from yellow oxide of iron, yellow iron sesquioxide, brown iron oxide, iron sesquioxide, Food Yellow No.4, Food Yellow No. 5, Food yellow no. 4 aluminium lake, Food Red No. 2, food red No. 3, Food Red No. 102. Particularly preferably, the light screening agent is yellow iron sesquioxide or iron sesquioxide.SELECTED DRAWING: Figure 1【課題】前立腺肥大に伴う排尿障害の治療に用いられる、シロドシンの光に対する化学的な安定性を向上させた、錠剤の提供。【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。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。黄色三二酸化鉄又は三二酸化鉄が遮光剤として、特に好ましい錠剤。【選択図】図１
