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Plan B One-Step contains levonorgestrel 1.5mg, a synthetic progestin. It works primarily by delaying or preventing ovulation so that fertilization cannot occur. It is not effective if you are already pregnant and will not terminate an existing pregnancy.

Plan B One-Step should be taken as soon as possible after unprotected sex. It is approved for use within 72 hours, but it is most effective the sooner it is taken. Effectiveness decreases with each passing hour.

Plan B One-Step can be used more than once if needed, but it is not intended as a regular method of contraception. If you find yourself frequently needing emergency contraception, a licensed physician can discuss ongoing contraceptive options that may be more suitable for you.

Common side effects include nausea, abdominal cramping, fatigue, headache, dizziness, breast tenderness, and changes to your next menstrual period. These effects are typically mild and short-lived. Contact a healthcare provider if you experience severe abdominal pain.

Plan B One-Step does not replace your regular birth control method. You should continue using your regular contraception as prescribed after taking Plan B One-Step. Your next period may arrive earlier or later than expected.

It is normal for your period to be a few days early or late after taking Plan B One-Step due to its hormonal effects. If your period is more than a week late, it is recommended to take a pregnancy test and follow up with a healthcare provider.

Doctronic uses an AI-guided evaluation to collect your health information, which is then reviewed by a licensed physician. The physician determines whether treatment is appropriate and, if so, creates a personalized treatment plan for you.

Yes. Doctronic connects you with licensed physicians who review every case. All consultations are HIPAA-compliant, and the platform is subject to ongoing medical audits to ensure safe, high-quality care for adults 18 and older in any U.S. state.