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Necon Uses

A Note About Necon 1/50 and High-Dose Estrogen Contraceptives

Necon 1/50 (but not the other types of Necon) contains a high dose of the estrogen component (mestranol), compared to most other birth control pills that are currently available. Any birth control pill with 50 mcg (0.05 mg) or more of an estrogen is considered a high-dose estrogen birth control pill. When birth control pills first came out, they had much higher estrogen doses, compared to today's birth control pills. Over the years, new birth control pills have gradually reduced the estrogen dose, as estrogen is responsible for many of the dangerous problems associated with birth control pills (like heart problems, blood clots, and strokes).
Although these new low-dose birth control pills are effective, they tend to provide less cycle control. This means that there is often more bleeding between periods (breakthrough bleeding) and, sometimes, heavier periods with low-dose pills. The high-dose birth control pills seem to control the growth of the endometrium (the lining of the uterus that is shed with bleeding) more than the low-dose pills.
Because the higher dose of estrogen in Necon 1/50 increases the risk of many serious side effects, you should only take it if your healthcare provider thinks that this is the best choice for your situation. If regular or low-dose birth control pills work fine for you, you should not take Necon 1/50.

How Does Necon Work?

As mentioned, Necon is a combined oral contraceptive, the most common type of birth control pill used today. It contains a combination of two different types of hormones: an estrogen and a progestin. The hormones in Necon prevent pregnancy primarily by stopping ovulation (the maturation and release of eggs from the ovaries).
Necon also works to prevent pregnancy in two other, minor ways. It changes the cervical mucus (the fluid of the cervix, which is the lower, narrow part of the uterus that is connected to the vagina), making it more difficult for sperm to enter the uterus. It also alters the lining of the uterus (the endometrium), making it less receptive to an embryo.
Last reviewed by: Kristi Monson, PharmD
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