| 翻訳と辞書 |
| levonorgestrel ： ウィキペディア英語版 |
levonorgestrel
Levonorgestrel is a manufactured hormone used in a number of birth control methods.〔(【引用サイトリンク】url=http://www.drugs.com/monograph/progestins-etonogestrel-levonorgestrel-norethindrone.html )〕 In pill form, sold under the brand name Plan B among others, it is useful within 120 hours as emergency birth control. It becomes less effective the longer after sex and only works before pregnancy has occurred.〔 It is also combined with an estrogen to make combined oral birth control pill. Within an IUD with progestogen, sold as Mirena among others, it is effective for long term prevention of pregnancy.〔 An implantable form of levonorgestrel is also available in some countries.
Common side effects include nausea, breast tenderness, headaches, and increased, decreased, or irregular menstrual bleeding. If used as a form of emergency contraception during pregnancy there is no evidence it affects the baby. It is safe to use during breastfeeding. Levonorgestrel containing birth control does not change the risk of sexually transmitted infections. It works by decreasing ovulation and closing off the cervix to prevent the passage of sperm.〔
Levonorgestrel was first made in the 1960s and it use as a method of birth control began in the 1980s. It is on the World Health Organization's List of Essential Medicines, the most important medication needed in a basic health system. It is available as a generic medication.〔 Wholesale it costs between 0.23 and 1.65 USD for the dose required for emergency birth control.〔(【引用サイトリンク】url=http://erc.msh.org/dmpguide/resultsdetail.cfm?language=english&code=LEV15T&s_year=2014&year=2014&str=1%2E5%20mg&desc=Levonorgestrel&pack=new&frm=TAB-CAP&rte=PO&class_code2=18%2E3%2E1%2E&supplement=&class_name=%2818%2E3%2E1%2E%29Oral%20hormonal%20contraceptives%3Cbr%3E )〕 In the United States it is over the counter for those over 16 years of age.
==Usage==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「levonorgestrel」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|