<unk>  <unk> E), also known as norethindrone<unk> , is a form of hormonal birth control which is used to prevent pregnancy in women. It is used both as a form of progestogen-only injectable birth control and in combined injectable birth control formulations. It may be used following childbirth, miscarriage, or abortion. The failure rate per year in preventing pregnancy for the progestogen-only formulation is 2 per 100 women. Each dose of this form lasts two months with only up to two doses typically recommended. Side effects include breast pain, headaches, depression, irregular menstrual periods, and pain at the site of injection. Use in those with liver disease is not recommended as is use during pregnancy due to risk of birth defects. Use appears to be okay during breastfeeding. It does not protect against sexually transmitted infections.<unk> E is an ester and prodrug of norethisterone, through which it works. It works as a method of birth control by stopping ovulation. Norethisterone was patented in 1951 and<unk> E came into medical use in 1957. It is on the World Health Organization's List of Essential Medicines. It has been approved by itself in more than 60 countries including the United Kingdom and some in Europe, Central America, and Africa, and in combination with estradiol valerate in at least 36 countries mainly in Latin America. It is not available in the United States.
Norethisterone enanthate
Norethisterone acetate
Nandrolone hydrogen succinate
Nandrolone phenylpropionate
Nandrolone furylpropionate
Androstanolone benzoate
Nandrolone decanoate
Nandrolone caproate