Basic Information about Birth Control Pills
Thinking of going on the pill? Read this first
The pill is one of the most effective reversible methods of birth control; of 100 women who use the pill in the
first year, only eight will become pregnant. However, fewer than one woman will become pregnant with perfect
use.
Oral contraception is commonly referred to as “the pill.” There are two basic types of oral contraceptives:
combination pills and progestin-only pills. Both pills are made of hormones. Combination pills contain estrogen and
progestin. Both require a medical prescription, and both are effective methods of birth control preventing
pregnancy.
Combination pills usually work by preventing ovulation from happening. This pill also thickens the cervical
mucus, which keeps sperm from joining with an egg in case an ovulation did happen.
Progestin-only pills usually work by thickening the cervical mucus. They prevent ovulation less often than
combination pills.
The hormones in combination and progestin-only pills also thin the lining of the uterus. Although this could
prevent pregnancy by interfering with implantation of a fertilized egg, there is no scientific evidence that this
occurs.
Taking the pill daily is absolutely essential to keep the pill effective as birth control. Keep in mind that
certain medicines and supplements may make the pill less effective. These include the antibiotic rifampin, certain
anti-fungals that are taken orally for yeast infections, certain anti-HIV protease inhibitors, certain anti-seizure
medications, and St. John's Wort
Before you get a prescription for any prescription method of birth control, you should talk to your clinician about
the medicines you already take. Vomiting and diarrhea may also make birth control less effective. Follow directions
printed on the birth control box if this occurs.
Taking the pill is simple, safe, and convenient. The pill gives many advantages, including some protection against
pelvic inflammatory disease.
The combination pill offers many more benefits, including protection against cancer of the uterine lining, acne,
ovarian cancer, excess body hair, osteoporosis, ovarian cysts, breast growths, iron deficiency, premenstrual
symptoms, and vaginal dryness.
Possible Side Effects
Women on the pill may experience some undesirable side effects when first starting the pill. Keep in mind that
many of these symptoms settle down after a couple of months. Side effects that usually clear up in a couple of
months include spotting, breast tenderness, headache, or nausea. Combination pills may change your sexual desire or
cause depression.
Keep in mind that irregular spotting and bleeding happen more frequently with progestin-only pills than with
combination pills. If you have a history of depression, consider using an alternate form of birth control. You can
also change the prescription to another pill if you continue to experience side effects after three months.
Frequently Asked Questions About Birth Control: Vol 4 V
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