Refers to a Pharmaceutical composition comprising: a) A progestin as 50 to 900? G levonorgestrel, 1 to 30mg of Dienogest, 60 to 900? G desogestrel, 30 to 750? G gestodene, 1.5 to 75mg of chlormadinone acetate (CMA), 180 to 3700. G Norgestimate (NGM) or 2.5 to 37mg acetate nomegestrol (nomac) and (b) an inhibitor of Cox as 5 to 60mg of piroxicam, 300 to 3800mg Naproxen,100 to 1200mg of celecoxib, among others. Said composition is useful for Emergency ContraceptionSE REFIERE A UNA COMPOSICION FARMACEUTICA QUE COMPRENDE: A) UN GESTAGENO TAL COMO 50 A 900?G DE LEVONORGESTREL, 1 A 30MG DE DIENOGEST, 60 A 900?G DE DESOGESTREL, 30 A 750?G DE GESTODENO, 1,5 A 75MG DE ACETATO DE CLORMADINONA (CMA), 180 A 3700?G DE NORGESTIMATO (NGM) O 2,5 A 37MG DE ACETATO DE NOMEGESTROL (NOMAc) Y B) UN INHIBIDOR DE COX TAL COMO 5 A 60MG DE PIROXICAM, 300 A 3800MG DE NAPROXENO, 100 A 1200MG DE CELECOXIB, ENTRE OTROS. DICHA COMPOSICION ES UTIL PARA LA ANTICONCEPCION EN CASO DE EMERGENCIA