Plan B One-Step is an emergency contraceptive pill that can be taken to prevent pregnancy after unprotected sex or contraceptive failure. It contains levonorgestrel, a synthetic hormone that works by preventing ovulation or fertilization of an egg. It is not an abortion pill and will not terminate an existing pregnancy.

This medication is intended for use as a backup method of contraception and should not be used as a regular form of birth control. It is most effective when taken as soon as possible after unprotected sex, but can be taken up to 72 hours (3 days) afterward. However, the sooner it is taken, the more effective it will be.

Plan B One-Step is available over-the-counter without a prescription for individuals of all ages. It is a safe and well-tolerated medication, but like any medication, it may have side effects. Common side effects include nausea, abdominal pain, fatigue, headache, and menstrual changes. These side effects are usually mild and temporary.

It is important to note that Plan B One-Step does not protect against sexually transmitted infections (STIs). It is also not recommended for individuals with a known allergy to levonorgestrel or any other ingredients in the medication.

If you have any questions or concerns about Plan B One-Step, it is best to consult with a healthcare provider or pharmacist. They can provide you with more information about how to use the medication correctly and answer any questions you may have. Remember, emergency contraception is an important option to have available in case of contraceptive failure, but it should not be relied upon as a primary method of birth control.