Birth control pills are oral contraceptives that are taken at the same time every day to prevent pregnancy. Some pills combine two hormones (estrogen and progestin) while others contain only progestin. Oral contraceptives mainly work by preventing ovulation so you do not get pregnant. When used consistently and correctly, both types of pills have an effectiveness of more than 99%, but their typical effectiveness in real-world situations is approximately 92%.
Birth control pills are easy to use. You need to take one pill every day at the same time and start your new pack on time for your pills to be most effective. If you miss a pill, you should refer to the Patient Information sheet that comes with your pills.
In addition to preventing pregnancy, using the Pill may provide certain non-contraceptive health benefits including:
More regular menstrual cycle
Lighter and shorter periods
Fewer cramps
Less frequent ovarian cysts, noncancerous cysts, and lumps in the breast
Less frequent episodes of acute pelvic inflammatory disease (PID)
May provide some protection against developing cancer of the ovaries or the uterine lining
Oral contraceptives can be associated with an increased risk of several serious cardiovascular side effects, including blood clots, stroke, and heart attack. Women, especially those over 35, are strongly advised not to smoke because it increases these risks. Some women should not use the Pill, including women who have blood clots, certain cancers, a history of heart attack or stroke, as well as those who are or may be pregnant. The Pill does not protect against HIV infection or other STDs.
Other important things to remember:
Many women have spotting, light bleeding, or may feel sick to their stomach during the first few pill packs. Do not stop taking the Pill if you experience these symptoms. The problem will usually go away. If it does not go away, talk to your health care provider.
Missing pills can also cause spotting or light bleeding, even after you make up the missed pills.
Irregular bleeding is common in the first few months of taking the Pill, but may also occur after you have been taking the Pill for some time. The problem will usually go away. Do not stop taking your pills - it is important to continue taking your pills on schedule. Call us if bleeding occurs in more than one cycle or lasts for more than a few days.
