Morning After Pill: What You Need to Know Right Now
Missed a condom or your birth control failed? The morning after pill can lower the chance of pregnancy if you act quickly. This guide gives straight answers: how the pill works, how soon you should take it, side effects to expect, and where to get one fast.
How it works and timing
There are two common pills: levonorgestrel (sold as Plan B or generic) and ulipristal acetate (sold as ella). Levonorgestrel works best within 72 hours after unprotected sex and loses effectiveness over time. Ulipristal can work up to 120 hours (5 days) and generally performs better later in that window.
The copper IUD is the single most effective emergency option. If placed by a clinician within about 5 days of sex, it can prevent pregnancy and then serve as long-term birth control.
Important: the morning after pill prevents ovulation or delays it. It will not end an existing pregnancy. If you already have a confirmed pregnancy, the pill does nothing to that pregnancy.
Practical safety tips and when to see a doctor
Common side effects are mild: nausea, tiredness, spotting, and a heavier or lighter next period. Serious problems are rare. If you have severe belly pain days after taking the pill, seek medical care—rare complications like ectopic pregnancy need attention.
Certain medicines make emergency pills less effective. Drugs that speed up liver enzymes—like rifampin, some anti-seizure meds (carbamazepine, phenytoin), and St. John’s wort—can reduce effectiveness. If you take those, tell your clinician; a copper IUD or other strategies may be recommended.
Body weight can matter. Levonorgestrel may be less reliable for people with higher BMI. Ulipristal tends to work better in those cases, and a copper IUD is least affected by weight. If you’re unsure, ask a provider.
Yes, you can take emergency pills more than once, but they’re not a regular birth control method. If you find yourself using them frequently, talk to a clinician about ongoing contraception—implants, IUDs, or pills give better protection and are cheaper over time.
Where to get one: levonorgestrel is available over the counter at most pharmacies. Ulipristal usually requires a prescription. Planned Parenthood, local sexual health clinics, and some telemedicine services can help you get the right option fast. If you need maximum protection or you’re past the pill windows, ask about the copper IUD.
Need help deciding? Most clinics will answer quick questions and point you to what’s best for your situation. Act fast, be honest about other meds you take, and pick a follow-up birth control method that fits your life.
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