- What Is the Pill?
- Different Types of Oral Contraceptive Pills
- How Do OCPs Work?
- How to Take OCPs
- Benefits of OCPs
- Side Effects
Oral contraceptive pills (OCPs) or birth control pills or the pill is a hormonal pill that is used to prevent pregnancy. The hormones estrogen and progestin in the pill alter the hormone levels that must be maintained to conceive. OCPs are prescription tablets that are taken once a day and at the same time every day for best results. It is important to note that OCPs do not prevent the transmission of sexually transmitted diseases (STDs).
Because the pills alter your hormone levels, it is possible to temporarily stop or prevent your period with continuous use of any birth control pill. Skipping periods for some women would mean skipping debilitating cramps, bloating and moodiness that regularly arise at that time of the month. This can make a difference in the quality of life for many women and relieve the stress of anticipating these symptoms. Once the OCPs are discontinued, the menstrual cycle returns to normal. The pill won’t stop the period permanently. Risks associated with the continuous use of the pill are the same as those with regular use with a slightly increased risk of blood clots and stroke. You must consult with a doctor for an appropriate regimen.
What are the different types of oral contraceptive pills?
There are two main types of oral contraceptive pills (OCPs).
1. Combination pills: These are the most common type of OCPs and contain both estrogen and progesterone. There are several types of combination pills.
- Monophasic pills are used in one-month cycles and provide the same level of hormones throughout the month.
- Multiphasic pills are used in one-month cycles and provide different levels of hormones during the cycle.
- Extended-cycle pills are used in 13-week cycles. Active pills with hormones are taken for 12 weeks and inactive pills are taken during the last week of the cycle. As a result, periods occur only three to four times per year.
2. Progestin-only pills or mini pills: These contain progestin without estrogen. These pills are a suitable option for women who breastfeed, smoke, have a history of blood clots, are older than 35 years old or who can’t take estrogen. These pills may cause irregular periods and, at times, stop them.
How do oral contraceptive pills work?
Combination pills containing estrogen and progestin prevent pregnancy primarily by stopping ovulation (release of the egg from the ovaries). Progesterone causes thickening of the cervical mucus, which makes it difficult for the sperm to swim through the cervix to reach the egg, thus preventing fertilization. The hormones also prevent pregnancy by causing changes in the lining of the uterus (endometrium), making it impossible for the fertilized egg to become implanted in the uterine wall.
The progestin-only pill prevents pregnancy typically by thickening the cervical mucus to stop the sperm from reaching the egg and thinning the endometrium to prevent the implantation of the fertilized egg. In addition, progestin-only pills may prevent ovulation (40 percent).
How are oral contraceptive pills taken?
The regimen depends on the type of pill
- Combination oral contraceptive pills (OCPs): Combination pills come in packs of 21-, 24- or 28-day cycles. The first pill must be taken on the first day of a woman’s period. One pill has to be taken every day at the same time. The last seven pills in the packet are a different color. They are either vitamin pills or empty pills. These pills, when taken, allow bleeding to occur.
- Progestin-only pills or mini pills: Progestin-only pills come in a 28-day pack and must be started on the first day of a woman’s period. One pill must be taken every day at the same time.
- Stopping the period: It's possible to prevent a period by continuously using any birth control pill. This means skipping the placebo pills and starting right away on a new pack. You must consult a doctor before doing this. Amethyst is a combination birth control pill that is the first birth control pill approved by the U.S. Food and Administration (FDA) for continuous use for 365 days without placebo pills.
- Missed dose: Individual brands of OCPs come with specific directions to be followed if one or more doses are missed. A backup method of birth control has to be used for seven to nine days or until the end of the cycle to prevent pregnancy.
Are oral contraceptive pills effective?
When oral contraceptive pills (OCPs) are taken as prescribed, they are 99 percent effective in preventing pregnancy. When OCPs are missed for one day or not taken at the same time every day, they are 91 percent effective.
Conditions that reduce the effectiveness of OCPs include
- Forgetting to take OCPs for two or more days
- Diarrhea or vomiting for more than 48 hours (two days)
- Taking medications such as certain human immunodeficiency virus (HIV) medicines, certain anti-seizure medicines, the antifungal griseofulvin, the antibiotic rifampin and St. John’s wort
What are the benefits of oral contraceptive pills?
The benefits of oral contraceptive pills (OCPs) include
- 24/7 protection against pregnancy
- Better than most birth control options
- Reversible (Upon stopping OCPs, the cycle will return to normal and a woman can become pregnant.)
OCPs prevent or lessen
What are the disadvantages of oral contraceptive pills?
The downside of oral contraceptive pills (OCPs) include
- OCPs don’t offer protection against sexually transmitted infections (STIs) including human immunodeficiency virus (HIV). Condoms need to be used along with the daily pill to protect against STIs.
- The pill should be taken every day at the same time.
- OCPs are not recommended for people who have migraines with aura, high blood pressure, high cholesterol or diabetes, breast cancer, cancer of the reproductive organs, heart attack, kidney disease, liver disease, stroke or certain forms of lupus.
What are the side effects of oral contraceptive pills?
The hormones in oral contraceptive pills (OCPs) may cause minor side effects in some people when starting OCPs. Side effects usually disappear in two to three months of taking OCPs. Common side effects include
- Irregular menstrual bleeding
- Breast tenderness
- Mood changes
- Decreased libido
- Bloating or weight gain
- Increased blood pressure
An increased risk of blot clots, especially with the use of combination pills, can lead to rare and serious side effects including stroke, heart attack, deep vein thrombosis, pulmonary embolism and liver or gallbladder disease.
If persistent side effects are present, the doctor may recommend a different type of contraception or a different type or brand of OCPs.
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