Estrogen (medication)
Estradiol, estrone, and estriol have all been approved as pharmaceutical drugs and are used medically. Estetrol is currently under development for medical indications, but has not yet been approved in any country. A variety of synthetic estrogen esters, such as estradiol valerate, estradiol cypionate, estradiol acetate, estradiol benzoate, estradiol undecylate, and polyestradiol phosphate, are used clinically. The aforementioned compounds behave as prodrugs to estradiol, and are much longer-lasting in comparison when administered by intramuscular or subcutaneous injection. Esters of estrone and estriol also exist and are or have been used in clinical medicine, for example estrone sulfate (e.g., as estropipate), estriol succinate, and estriol glucuronide (as Emmenin and Progynon).
Levonorgestrel
Levonorgestrel is marketed alone or in combination with an estrogen (specifically ethinylestradiol, estradiol, or estradiol valerate) under a multitude of brand names throughout the world, including "Alesse", Altavera, Alysena, Amethia, Amethyst, Ashlyna, Aviane, Camrese, Chateal, "Climara Pro", Daysee, Emerres, Enpresse, Erlibelle, "Escapelle", Falmina, Introvale, Isteranda, "Jadelle", "Jaydess", Jolessa, "Klimonorm", Kurvelo, Kyleena, Lessina, "Levlen", Levodonna, "Levonelle", Levonest, Levosert, Levora, Liletta, "Loette", "Logynon", "LoSeasonique", Lutera, Lybrel, Marlissa, "Microgynon", "Microlut", Min-Ovral, "Miranova", "Mirena", My Way, Myzilra, Next Choice, "Nordette", Norgeston, NorLevo, "Norplant", Option 2, Orsythia, Ovima, Ovranette, "Plan B", "Plan B One-Step", Portia, "Postinor", "Postinor-2", Preventeza, Ramonna, "Rigevidon", Quartette, Quasense, "Seasonale", "Seasonique", "Skyla", Sronyx, Tri-Levlen, "Trinordiol", Triphasil, "Triquilar", "Tri-Regol", Trivora, and Upostelle, among many others. These formulations are used as emergency contraceptives, normal contraceptives, or in menopausal hormone therapy for the treatment of menopausal symptoms.