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The risk of VTE with estradiol/nomegestrol acetate birth control pills is under study. [11] Incidence of irregular vaginal bleeding may be higher with estradiol-containing birth control pills in relation to the fact that estradiol is a weaker estrogen than ethinylestradiol in the endometrium. [3]
Drospirenone/estetrol, sold under the brand name Nextstellis, among others, is a fixed-dose combination medication containing drospirenone, a progestin, and estetrol, an estrogen, which is used as a combined birth control pill for the prevention of pregnancy in women. [2] [6] It is taken by mouth. [2] [6]
Combined hormonal contraception (CHC), or combined birth control, is a form of hormonal contraception which combines both an estrogen and a progestogen in varying formulations. [ 1 ] [ 2 ] The different types available include the pill , the patch and the vaginal ring , which are all widely available, [ 3 ] and an injection , which is available ...
Pregnancy category: AU: B3 [1] Routes of administration: By mouth: ATC code: ... and antiandrogen, which is used as a birth control pill to prevent pregnancy in women
Common side effects include constipation, abdominal pain, dark stools, and diarrhea. [14] Other side effects, which may occur with excessive use, include iron overload and iron toxicity. [11] [13] Ferrous salts used as supplements by mouth include ferrous fumarate, ferrous gluconate, ferrous succinate, and ferrous sulfate. [13]
However, typical use of combined oral contraceptive pills by users often consists of timing errors, forgotten pills, or unwanted side effects. With typical use, the estimated risk of getting pregnant is about 9% which means that about 9 in 100 women on combined oral contraceptive pills will become pregnant in one year. [ 41 ]
These differences make EE more favorable for use in birth control pills than estradiol, though also result in an increased risk of blood clots and certain other rare adverse effects. [7] EE was developed in the 1930s and was introduced for medical use in 1943. [13] [14] The medication started being used in birth control pills in the 1960s. [15]
Drospirenone is a progestin and antiandrogen medication which is used in birth control pills to prevent pregnancy and in menopausal hormone therapy, among other uses. [1] [10] It is available both alone under the brand name Slynd and in combination with an estrogen under the brand name Yasmin among others.