50% particle size in cumulative particle size distribution is less than more than 15 m 40 m and hydroxyalkyl group content of the hydroxyalkyl cellulose particles in the range from 40 to 80 weight percent, and agent as a pharmaceutical ingredient, if necessary, excipients, binders, disintegrating agents, lubricants, controlled release agents, base, colorants, pH adjustment agents, pH buffering agents, and surfactants, stabilizers, acidulants, flavors, fluidizing agents, cooling agents, sweeteners, flavor components, additives such as sweetness enhancers, The by dry tabletting molding, to obtain an orally disintegrating tablet.累積粒度分布における50%粒子径が15μm以上40μm未満で且つヒドロキシアルキル基の含有量が40~80質量%の範囲にあるヒドロキシアルキルセルロース微粒子と、医薬成分としての主薬と、必要に応じて、賦形剤、結合剤、崩壊剤、滑沢剤、徐放化剤、基材、着色剤、pH調整剤、pH緩衝剤、界面活性剤、安定化剤、酸味料、香料、流動化剤、清涼化剤、甘味料、旨み成分、甘味増強剤などの添加剤と、を乾式打錠成形して、口腔内崩壊錠を得る。
