The invention is directed to a memory cell on a substrate having a plurality of shallow trench isolations form therein, wherein top surfaces of the shallow trench isolations are lower than a top surface of the substrate and the shallow trench isolations together define a vertical fin structure of the substrate. Specifically, it relates to aerosols containing migraine headache drugs that are used in inhalation therapy. 5 to 200 dtex, a fineness D is in the range of 50 to 6000 dtex, and a twist coefficient K expressed by Formula is in the range of 10000 to 35000:twist coefficient K=number of twists T\xd712\u2003\u2003where the number of twists T denotes the number of twists per meter and the fineness D is a total fineness.