A medical device comprising an expandable member having a drug coat layer, wherein the drug coat layer includes a plurality of crystal particles of a water-insoluble drug having a uniform size regularly arranged on the surface of the medical device Preparing a medical device having the following: inserting the medical device into a peripheral blood vessel; expanding the expandable member; and placing the drug-coated layer on the blood vessel so that at least some of the plurality of crystals migrate to the blood vessel wall. A drug that maintains the drug concentration in the blood vessel so that it is pressed against the wall and the proliferation of smooth muscle cells is suppressed during the high drug concentration period, and the endothelial cell proliferation is not suppressed during the subsequent low drug concentration period. A method of treating lower limb peripheral arterial disease by reducing an expandable member to provide a dynamic profile. [Selection figure] None薬剤コート層を有する拡張可能部材を備えた医療器具であって、薬剤コート層が医療器具の表面上に規則的に配置され均一なサイズをもつ水不溶性薬剤の複数の結晶粒子を含む結晶形態型を有する医療器具を用意することと、医療器具を末梢血管に挿入することと、拡張可能部材を拡張することと、複数の結晶の少なくとも一部が血管壁に移行するように薬剤コート層を血管壁に押付けることと、高薬剤濃度期間においては平滑筋細胞の増殖が抑制され、かつ、その後の低薬剤濃度期間においては内皮細胞の増殖が抑制されないように血管中薬剤濃度が保たれる薬物動態プロファイルがもたらされるように、拡張可能部材を縮小させることによる、下肢末梢動脈疾患の治療方法。【選択図】なし