(R) -N- [1- (3,5-difluoro-4-methanesulfonylamino-phenyl) -ethyl] -3- (2-propyl-6-trifluoromethyl-pyridin-3-yl ) -Acrylic amide as a first component, and relates to a pharmaceutical composition comprising a cellulose-based polymer as a second component, the composition of the present invention has a formulation property that crystal formation is delayed for a long time.(R)-N-[1-(3,5-다이플루오로-4-메테인설폰일아미노-페닐)-에틸]-3-(2-프로필-6-트라이플루오로메틸-피리딘-3-일)-아크릴아마이드를 제1 성분으로 포함하고, 셀룰로오스계 폴리머를 제2 성분으로 포함하는 약학 조성물에 관한 것으로, 본 발명의 조성물은 결정형성이 장기간 지연되는 제형 특성을 가진다.