Does Plan B Work On Your Period

How To Take Levonorgestrel

Plan B Contraceptive Pill | How to Know if Plan B Worked?

Plan B One Step can be purchased over the counter at drugstores without a prescription or proof of age. Because it is most effective when taken as soon as possible , consider having a ready supply in your medicine cabinet. Better yet, use a reliable form of birth control, and plan for a backup method of birth control.

You can take it if:

  • You didn’t use any birth control.
  • The condom came off or broke.
  • The diaphragm slipped out of place.
  • You missed at least two or three active birth control pills in a row.
  • You forgot to insert your ring or apply your patch.
  • Your partner didn’t pull out in time.
  • You have another reason to think your birth control might not have worked.
  • You were forced to have unprotected sex.

Remember:Plan B will not protect you from getting pregnant if you have unprotected sex after taking it. To protect you against getting pregnant, you need to take it right after you have unprotected sex and use a form a contraception when you have sex

Do not take levonorgestrel if:

  • You know you are pregnant or suspect you might be.
  • You have a history of allergy or hypersensitivity to its ingredients.
  • You have a history of recent abnormal vaginal bleeding that your doctor has not yet evaluated.

How Much Is The Part D Penalty

The cost of the late enrollment penalty depends on how long you went without Part D or creditable prescription drug coverage.

Medicare calculates the penalty by multiplying 1% of the “national base beneficiary premium” times the number of full, uncovered months you didn’t have Part D or creditable coverage. The monthly premium is rounded to the nearest $.10 and added to your monthly Part D premium.

The national base beneficiary premium may change each year, so your penalty amount may also change each year.


Mrs. Martinez is currently eligible for Medicare, and her Initial Enrollment Period ended on May 31, 2017. She doesn’t have prescription drug coverage from any other source. She didn’t join by May 31, 2017, and instead joined during the Open Enrollment Period that ended December 7, 2019. Her drug coverage was effective January 1, 2020.


Since Mrs. Martinez was without creditable prescription drug coverage from June 2017December 2019, her penalty in 2021 was 31% of $33.06 , or $10.25 each month. Since the monthly penalty is always rounded to the nearest $0.10, she pays $10.30 each month in addition to her plan’s monthly premium.

Here’s the math:

.31 × $33.06 = $10.25

$10.25 rounded to the nearest $0.10 = $10.30

$10.30 = Mrs. Martinez’s monthly late enrollment penalty for 2021

Is Bleeding Normal After Taking Plan B

According to the drugs package insert, Plan B can cause fluctuations in your period. That means you might get your period at an unexpected time, or it might be longer or shorter than usual. Most women who take Plan B dont bleed heavily, but its possible.

In a 2006 study of 232 women, only 14.7 percent of participants spotted or bled between periods after taking the morning-after pill.

While light-to-moderate bleeding is normal, you shouldnt be bleeding heavily.

We cleared up 21 other reasons for spotting between periods here.

Recommended Reading: What Is Considered Heavy Period Bleeding

Research Findings Vs Fda Labeling

Monique Rainford, MD, is board-certified in obstetrics-gynecology, and currently serves as an Assistant Clinical Professor at Yale Medicine. She is the former chief of obstetrics-gynecology at Yale Health.

Plan B One-Step is an emergency contraceptive. Emergency contraceptives are used to prevent pregnancy after birth control failure or unprotected sex. Generic forms of Plan B include My Way, Take Action, and Next Choice One Dose.

Emergency contraception is safe and effective. Still, Plan B is controversial. Much of the debate is based on a misunderstanding about how Plan B works.

Some people believe Plan B prevents a fertilized egg from implanting in the lining of the uterus. This belief is based on the product’s FDA labeling. Research, however, has not confirmed the information on the FDA label.

This article will discuss the controversy around the FDA labeling for Plan B. It will also look at what research says about how Plan B actually works.

What Is In Plan B

Does Plan B mess up your cycle? For how long?

“Levonorgestrel is the active hormone in Plan B,” says Krishna Kakani, an MD who has her own OB/GYN practice.

Levonorgestrel is a synthetic progestin hormone that prevents pregnancy in two ways:

  • In case the egg has already been released, it works by blocking fertilization and altering the uterine lining so that the egg cannot attach itself to the wall of the uterus.
  • It’s important to note that plan B works to prevent fertilization, it will not terminate a pregnancy if the egg has already implanted.

    Since levonorgestrel affects ovulation and the uterine lining to prevent pregnancy, taking Plan B could alter the timing, length, and flow of your next period.

    “Emergency contraceptives that contain levonorgestrel are most effective if taken within 72 hours of unprotected sex,” says Kakani. Plan B is just one type of emergency contraceptive that contains levonorgestrel. Others brands include:

    • Next Choice
    • Fallback
    • Opcicon

    Levonorgestrel is also an ingredient in other forms of birth control like oral birth control pills, vaginal rings, contraceptive implants, and birth control patches.

    Ella, another emergency contraceptive, contains a different hormone, known as ulipristal acetate. Like levonorgestrel, it works by preventing the release of the egg from the ovary. However, unlike levonorgestrel, which only offers you a 72-hour window, ella offers you a 120-hour window to prevent pregnancy after having unprotected sex.

    Recommended Reading: What Could Cause A Late Period

    How Do They Work

    Choosing the right EC depends on a few different factors. The potential of ECPs to be effective depends on where you are in your cycle, when unprotected intercourse occurred, when you take the pill, and which pill you take. While the copper IUD is always the most effective option, there are 1â2 days each cycle when it may be the only effective option. Some types of ECPs may be slightly more effective than others, or much more effective than others if taken just before ovulation occurs .

    When To Use It

    To reduce the risk of an unplanned pregnancy, Plan B One-Step should be taken as soon as possible within 72 hours of unprotected sex or contraceptive failure. The sooner Plan B One-Step is taken, the more effective it’ll be. Plan B One-Step can also be used any time during your menstrual cycle. If you vomit within 2 hours of taking the pill, you should immediately contact your healthcare provider to discuss whether to take another pill.

    Note: In general, emergency contraception can be used up to 5 days after unprotected sex. So it may still be useful to take Plan B One-Step for up to 120 hours after unprotected sex.

    Recommended Reading: List Of Tablets To Postpone Periods

    How Effective Is Levonorgestrel

    If you take the pill within 72 hours after you’ve had unprotected sex, levonorgestrel can reduce the risk of pregnancy by up to 87% if taken as directed. If you take Plan B One-Step within 24 hours, it is much more effective.

    But you should know that Plan B One-Step is not as effective as regular contraception. So don’t take it as a form of birth control. And, it does not protect you against sexually transmitted diseases. Think of it as a backup — not for routine use. That’s why it’s called Plan B. Get more information on emergency contraception and its effectiveness.

    Does Plan B Affect Your Period

    Nurse Practitioner explains the EMERGENCY CONTRACEPTIVE PILL-AKA Plan B: How does it work??

    Plan B is also referred to as the “morning after pill”. It is taken by those who have unprotected sex, or use a condom that splits during intercourse. These instances can lead to ejaculation in the vagina which can cause impregnation. Plan B will help to prevent this from happening, but it may affect your period. If you have taken plan B and are wondering, “Does Plan B affect your period?” you have come to the right place.

    Read Also: No Period On Patch Free Week

    When Should I Use Emergency Contraception

    You can consider using EC after unprotected intercourse when there is a possibility you could be fertile.

    But knowing when youâre fertile can be tough. If you donât want to get pregnant, it is best to err on the side of caution when considering emergency contraception. Officially, the fertile window is about six days longâfrom ~five days before ovulation, until 24 hours after ovulation occurs. But the timing of the fertile window can change cycle-to-cycle, and has been shown to be highly variable even for those who perceive their cycle as âregularâ . Over 7 in 10 women may be in their fertile window before day ten in their cycle, or after day 17 . It also takes up to six years after someone first gets their period for cycles to settle into their adult ‘norm’ . Things like stress, sleep changes, jet lag and intensive exercise can also affect the timing of your ovulation, most often causing it to be delayed . Ovulation is also affected by any medical conditions that influences the reproductive hormones. Knowing the exact timing of your ovulation usually requires using at-home methods like basal body temperature tracking or an ovulation-detection kit, or tests done at your healthcare providerâs office.

    How Do I Know If Plan B Worked

    Youll know if your emergency contraception worked when you get your next period, which could come within a week of when you expect. Your period may be heavier, lighter, earlier, or later than usual. EC pills can also cause some irregular bleeding or spotting afterward.

    If you dont get your period within three weeks after taking EC, take a pregnancy test. And if your period is more than a week late, you should also take a pregnancy test.

    You May Like: Signs That You Started Your Period

    Can You Still Get Pregnant After Taking Plan B

    The morning-after pill, sometimes referred to by brand name Plan B, is a levonorgestrel emergency contraceptive pill that prevents pregnancy after unprotected sex or if your contraception failed . It works by stopping an egg from being released from the ovary during ovulation, which prevents the egg from being fertilized if ovulation has already happened or prevents a fertilized egg from being implanted in the womb.

    There are many brands of levonorgestrel EC pills that work in the same way. This type of EC works best when taken as soon as possible after unprotected sex, ideally within 12 hours.

    When taken within 24 hours, levonorgestrel EC is 95 percent effective. If taken 4872 hours after unprotected sex, the Plan B effective rate is 61 percent. The effectiveness of Plan B decreases the longer you wait, so taking it sooner is better!

    After taking Plan B, you may feel some side effects, including nausea, abdominal pain, headache, dizziness, or vomiting. If you throw up within two hours of taking the pill, you should talk to a provider right away youll need to get a second dose or use another form of emergency contraception, like the copper IUD, in order to prevent pregnancy.

    The other type of morning-after pill has ulipristal acetate as the main ingredient and can prevent pregnancy when taken up to five days later. But they always work much better when taken within the first three days.

    You may also ask yourself, does it matter when in your cycle you take an EC pill?

    How To Take It

    Episode 3: Does Plan B actually work?

    Most research shows Plan B has a 52 to 100 percent effectiveness rate. Its success mainly depends on how soon after sex you take it and what stage your menstrual cycle is at.

    Plan B One-Step can work up to 120 hours after sex, but the sooner you take it, the better. You simply swallow a pill containing 1.5 milligrams of levonorgestrel.

    Plan B has no effect on your future fertility, so fear not. When youre ready to put a bun in the oven, having taken Plan B in the past wont affect your chances of conceiving.

    We give you the full rundown of what to do after having sex without a condom or other barrier method the important part is not to panic.

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    Dealing With The Bleeding

    Theres not much you can do to prevent bleeding, but you can deal with it just as you would a heavy period.

    Be sure to have some period products on hand after you take Plan B, and be prepared for a heavier period than usual. Your cycle should go back to normal the following month.

    Stopping regular hormonal contraception can also lead to bleeding learn more here.

    Will I Have A Normal Period After I Take Plan B

    It should go away by the time of your next period. However, it is possible that Plan B One-Step may cause your next period to be heavier or lighter than usual. It may also come earlier or later than is normal for you. If you dont get your period within three weeks, get a pregnancy test to make sure youre not pregnant.

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    Will Ec Affect Your Period

    EC is known to affect the timing of peoples periods.

    Some experience an earlier period, while others find theirs comes later.

    You may also notice changes in heaviness or light spotting in between taking the pill and your next period.

    Theres also a link between regularly taking EC and irregular periods.

    So its always better to use regular birth control instead of relying on Plan B, ella, and the like.

    Do I Need To Use Protection On My Period

    Pharmacist explains Plan B Contraceptive! Things you NEED to know!

    Yes, if you dont want to get pregnant because there is a risk of pregnancy when youre on your period, to avoid getting pregnant you should begin taking long-term contraception.

    If you need to get protection immediately the following contraceptives can be started straight away:

    • The combined contraceptive pill
    • Progestogen-only pill

    Protection against STDs matters too you also need protection from sexually transmitted diseases as well as getting pregnant. Barrier method contraceptives like condoms can help here.

    What if Im sure Im not at risk of pregnancy? even if youve carefully planned your periods using the rhythm method, there is still a chance you could get pregnant, so we recommend using another method of contraception.

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    Recommended Reading: Why Is My Period So Long And Heavy

    What Can Stop Implantation

    What is implantation failure? Asherman syndome and other scars in the uterine lining. A significant genetic defect in the embryo. A uterine lining that is not ready for implantation like a too thin endometrium. Chronic endometritis. Embryonic defects. Endometriosis. Progesterone resistance. An immature egg.

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