The levonorgestrel intrauterine system should be avoided in patients with a history of breast cancer; any consideration of it's use should be by a specialist in contraception and in consultation with the patients cancer specialist. Patients should be informed about the device that has been inserted and when it should be removed or replaced (including refering them to a patient information. Pilule du lendemain Lévonorgestrel Identification Nom UICPA (–)-13-éthyl-17-éthynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tétradécahydrocyclopenta[a] phénanthrén-3-one N o CAS 797-63-7 N o ECHA 100.011.227 N o CE 212-349-8 Code ATC G03 AC03 DrugBank APRD00754 PubChem 13109 Propriétés chimiques Formule C 21 H 28 O 2 [Isomères] Masse molaire 312,4458 ± 0,0194 g / mol C 80. Levonorgestrel apresenta efeitos progestogênicos, principalmente locais, na cavidade uterina. A elevada concentração de Levonorgestrel no endométrio inibe os receptores endometriais de progesterona e estrogênio, tornando o endométrio insensível ao estradiol circulante e promovendo, assim, um intenso efeito antiproliferativo. Durante o uso de Levonorgestrel, foram observadas alterações. Il levonorgestrel è l'isomero levogiro del norgestrel, un agonista progestinico di seconda generazione derivante dal nandrolone. Il levonorgestrel è usato a scopo contraccettivo, come principio attivo della pillola del giorno dopo o nella terapia ormonale sostitutiva post-menopausale.A tutto il 2013, in Italia, sono in commercio diverse pillole anticoncezionali combinate contenenti. For Healthcare Professionals. Applies to levonorgestrel: intrauterine device, oral tablet, subcutaneous implant. General. The most commonly reported adverse effects are alterations of menstrual bleeding patterns, nausea, abdominal/pelvic pain, headache/migraine, dizziness, fatigue, amenorrhea, ovarian cysts, genital discharge, acne/seborrhea, breast tenderness, and vulvovaginitis. Levonorgestrel tablets will not work if you are already pregnant and will not affect an existing pregnancy. Levonorgestrel tablets should not be used as regular birth control. It is important to have another reliable source of birth control that is right for you. Levonorgestrel tablets will not protect you from HIV infection (the virus that. El levonorgestrel se usa para evitar el embarazo después de una relación sexual sin protección (tener relaciones sexuales sin ningún método anticonceptivo o con un método anticonceptivo que falló o que no se usó de manera correcta [p. ej., un condón que se deslizó o se rompió, o píldoras anticonceptivas que no se tomaron según lo indicado]). Levonorgestrel is a hormonal medication which is used in a number of birth control methods. It is combined with an estrogen to make combination birth control pills. As an emergency birth control, sold under the brand name Plan B among others, it is useful within 72 hours. This should not be confused with EllaOne which can be effective within 120 hours (5 days) of unprotected sex. A list of drugs that interact with Levonorgestrel. Griseofulvin potentially decreases the efficacy of oral levonorgestrel. For FSRH guidance, see Contraceptives, interactions. El levonorgestrel (o I-norgestrel o D-norgestrel) es una progestina sintética de segunda generación. Se utiliza en métodos anticonceptivos hormonales como los implantes subcutáneos, los anticonceptivos de emergencia-píldora del día después-, píldoras anticonceptivas y dispositivos intrauterinos. [1] [2] [3. Química. El levonorgestrel (levo=izquierda) es una forma de una hormona que.