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The progestogen-only pill, colloquially known as "minipill". For perfect use it is 99% effective and typical use is 91% effective. Side effects of the pill include headache, dizziness, nausea, sore breasts, spotting, mood changes, acne, bloating, etc. [clarification needed] One pill offers the benefit of only having to be taken once a week:
In place 3 weeks / 1 week break: Progestogen only pill [29] POP, minipill: 9 [42] (1 in 11) 0.3 (1 in 333) Progestogen + placebo [43] Oral medication: Daily: Ormeloxifene [44] Saheli, Centron: 9 (1 in 11) 2 (1 in 50) SERM: Oral medication: Weekly: Emergency contraception pill: Plan B One-Step® no data: no data: Levonorgestrel: Oral medication ...
For example, one third of women aged 16–49 in the United Kingdom use either the combined pill or progestogen-only pill (POP), [19] [20] compared with less than 3% of women in Japan (as of 1950–2014).
In 1997, the FDA approved a prescription emergency contraception pill (known as the morning-after pill), which became available over the counter in 2006. [53] In 2010, ulipristal acetate, an emergency contraceptive which is more effective after a longer delay was approved for use up to five days after unprotected sexual intercourse. [54]
[1] [2] [17] Subsequently, levonorgestrel 30 μg (brand name Microval) was marketed in Germany in 1971. [ 60 ] [ 61 ] It was followed by a number of other POPs shortly thereafter in the early 1970s, including etynodiol diacetate , lynestrenol , norethisterone , norgestrel , and quingestanol acetate .
The typical dosage is either 1.5 mg taken once or 0.75 mg taken 12–24 hours apart. [41] The effectiveness in both methods is similar. [41] The most widely used form of oral emergency contraception is the progestin-only pill, which contains a 1.5 mg dosage of levonorgestrel. [40]
All contain an estrogen, ethinylestradiol or mestranol, [1] [2] in varying amounts, and one of a number of different progestogens. (Regarding the estrogen, the inactive 3-methyl ether of ethinylestradiol, which must be metabolized by the liver into the active ethinylestradiol; 50 μg of mestranol is equivalent to only 35 μg of ethinylestradiol and should not be used when high-dose [50 μg ...
The risk of venous thromboembolism with EE/CPA-containing birth control pills is similar to that with EE and gestodene-, desogestrel-, and drospirenone-containing birth control pills and about 50 to 80% higher than with EE and levonorgestrel-containing birth control pills.