A condom breaking or a missed contraceptive can leave you worried and unsure what to do. Emergency contraception can reduce the chance of pregnancy after sex. Timing matters: ask a licensed pharmacist or healthcare professional promptly about the options available where you live. You do not need to wait until the next morning to ask for help.
A question on your mind?
If pregnancy or abortion information feels overwhelming, you can get in touch. We can help with general questions about the information and guides on this site.
Start with a brief question, without sharing your medical history. We don’t provide diagnosis, prescribing or emergency care. If you feel seriously unwell, seek urgent medical help.
What Plan B actually is
Plan B One-Step is a US brand containing levonorgestrel, a hormone used for emergency contraception. Its US presentation is one 1.5 mg tablet. The brand name does not describe every morning-after pill: ulipristal acetate is a different medicine, and a copper IUD is a different method. A regular contraceptive pill, Plan B and abortion medicines should not be treated as interchangeable.
How it works: delaying ovulation
Ovulation is the release of an egg from an ovary. Plan B works before that release, by stopping or delaying it. This explains why taking action promptly matters and why effectiveness depends on where you are in the cycle. A calendar or period app cannot confirm exactly when you personally ovulated. Do not rely on an app prediction to dismiss a possible pregnancy risk.
Is Plan B an abortion pill or “pampalaglag”?
No. Plan B does not end an existing pregnancy. The US FDA states that the evidence does not support an effect on implantation or on maintaining a pregnancy after implantation. It is different from mifepristone and misoprostol used in abortion care. If a pregnancy test is positive, taking Plan B is not a way to end that pregnancy; discuss your questions with a qualified healthcare professional.
Why some sources say 72 hours and others say five days
The US Plan B label directs use as soon as possible within 72 hours after sex. Broader CDC guidance discusses emergency pills within five days, but levonorgestrel becomes less effective with delay. Ulipristal has an advantage over levonorgestrel at days three to five. A copper IUD, fitted by a trained professional, is another emergency option, usually within five days of sex. These are different options and guidance contexts, not a reason to wait.
Effectiveness: why a percentage cannot predict your result
No emergency pill guarantees that pregnancy will be prevented. Timing, ovulation and the method used all matter. Research averages describe groups, not your personal outcome. The NHS identifies the copper IUD as the most effective emergency method. A pharmacist or clinician can explain which options are suitable and available; an online comment cannot calculate an exact risk from a few dates.
Weight and medicines can change the choice
Levonorgestrel may be less effective than ulipristal in people with obesity. This is an effectiveness concern, not a reason for shame or for withholding advice. Ask promptly about alternatives rather than assuming nothing will help. Do not double a dose on your own. Tell the pharmacist about medicines for epilepsy, TB or HIV, and herbal products such as St John’s wort: some can reduce pill effectiveness. Give the actual medicine names.
Side effects, spotting and a late period
Nausea, headache and period-like cramps can happen. Your next period may be earlier or later, and spotting or changes in bleeding can occur. Symptoms or bleeding alone do not prove that the pill worked. If you vomit within two hours of levonorgestrel, contact a pharmacist promptly because a replacement dose may be needed. Explain the product and timing; instructions can differ between medicines.
When to take a pregnancy test
A home test is generally useful from a missed period. If you do not know when the period is due, test at least 21 days after the most recent unprotected sex. Testing too early can give an unreliable negative result. Seek advice if your period is more than a week late. If negative but pregnancy still seems possible, repeat after a few days and contact a clinician if the period still has not come. Later unprotected sex changes the testing timeline.
Protection after the emergency pill
An emergency pill does not provide continuing protection for sex later in the cycle. CDC guidance allows regular contraception to start or resume immediately after levonorgestrel, with condoms or avoiding sex for seven days. After ulipristal, hormonal contraception generally needs a five-day wait, followed by backup protection. Ask for instructions specific to the emergency product and your regular method; do not combine pills on your own.
Repeated use, fertility and breastfeeding
Emergency pills do not damage future fertility. Repeated use can make periods less predictable, and a regular contraceptive method is usually a better ongoing plan. Needing emergency contraception is a reason to discuss what works for you, not a reason for judgment. If breastfeeding, ask about the specific ingredient and current product advice rather than assuming every emergency pill has identical instructions.
When symptoms need urgent care
Severe lower abdominal pain after levonorgestrel needs medical assessment. Sudden intense pain, marked dizziness or fainting can be warning signs of an ectopic pregnancy, which emergency contraception does not treat. Seek emergency medical help for severe symptoms; do not wait for another pregnancy test or a website reply. Bring the medicine name and the date taken if you can.
STIs, unwanted sex and support
Emergency contraception does not protect against sexually transmitted infections. After unwanted or forced sex, medical care can also address injuries, infection risks and other time-sensitive needs. You deserve respectful support. Share personal details with an appropriate healthcare service rather than a public comment thread or this website’s general enquiry form.
Plan B information for readers in the Philippines
The sources here describe global guidance and US or UK products and services. They do not establish that Plan B, ulipristal or a particular service is registered, stocked or available in the Philippines. We have not verified a local Plan B supplier. Ask a licensed local pharmacist or healthcare service about current lawful options. An online listing, imported package or seller review does not prove authenticity. This website provides information and does not sell or prescribe contraception.
Questions to discuss with a pharmacist or clinician
Prepare the dates of any unprotected sex, the contraception used and what went wrong, and the names of medicines or supplements. Ask: Which emergency options are available today? Does my regular medicine affect them? When should I restart contraception and test? What symptoms need help? Keep these details private; our topic-suggestion form is for general subjects, not a personal care assessment.
Can I use regular birth-control pills instead?
Some clinical guidance includes a combined-pill emergency regimen called the Yuzpe method. It is less effective and causes more nausea than dedicated emergency pills. Formulations differ, so do not guess a tablet count from a brand name or a social post. Ask a qualified pharmacist or clinician about a locally appropriate option.
Should I take both Plan B and ulipristal to be safer?
Do not combine them on your own. Progestin-containing medicines can interfere with ulipristal’s action. Tell the pharmacist exactly what you already took and when, so they can advise on the next step.
Can I tell it worked from bleeding or having no side effects?
No. A bleeding change, cramps or feeling completely normal does not establish whether pregnancy was prevented. Use the pregnancy-testing timeline and seek care for worrying symptoms.
Sources and references
Read each source in its clinical and country context. Reference links do not imply endorsement of this website or a professional review of this article.
Plan B One-Step: levonorgestrel information
US Food and Drug Administration · US product labeling and mechanism; not Philippine authorization
Source accessed 31 October 2026Open the original source ↗Emergency contraception: US Selected Practice Recommendations
US Centers for Disease Control and Prevention · US clinical guidance dated 19 November 2024; local availability differs
Source accessed 31 October 2026Open the original source ↗Emergency contraception: fact sheet
World Health Organization · Global information; not confirmation of local product registration
Source accessed 31 October 2026Open the original source ↗Levonorgestrel: patient medicine information
MedlinePlus · US patient information; revised 20 May 2024
Source accessed 31 October 2026Open the original source ↗How to take the emergency contraceptive pill
NHS · UK timing and effectiveness information
Source accessed 31 October 2026Open the original source ↗Side effects of the emergency contraceptive pill
NHS · UK patient information; distinguish the product taken
Source accessed 31 October 2026Open the original source ↗Who can take the emergency contraceptive pill
NHS · UK information on suitability and medicine interactions
Source accessed 31 October 2026Open the original source ↗Doing a pregnancy test
NHS · Home-test information
Source accessed 30 October 2026Open the original source ↗Ectopic pregnancy: symptoms
NHS · Recognizing symptoms that need assessment
Source accessed 30 October 2026Open the original source ↗Counterfeit medicine
US Food and Drug Administration · Medicine-quality information; US licensing references are local to the US
Source accessed 30 October 2026Open the original source ↗Emergency contraception
NHS · Pregnancy prevention; availability differs by country
Source accessed 30 October 2026Open the original source ↗