Plan B One-Step (Levonorgestrel)

Plan B One-Step contains levonorgestrel 1.5 mg, a progestin used for emergency contraception.

It is intended to reduce the chance of pregnancy after unprotected sex or when regular contraception has failed. It works primarily by delaying or preventing ovulation and does not terminate an existing pregnancy.

Active ingredient: Levonorgestrel
Strength: 1.5 mg
Drug class: Progestin
Formulation: Oral tablet
U.S. availability: Over the counter
Use: Emergency contraception

Common side effects may include nausea, abdominal pain, fatigue, headache, dizziness, breast tenderness, or changes in the timing or amount of the next menstrual period.