Side Effects & Tolerability
When taken as directed, Plan B One-Step® is generally safe for women. Some women will have temporary side effects that include:
- Menstrual changes
- Lower stomach (abdominal) pain
- Breast pain
These are similar to the side effects that some women have when taking regular birth control pills. Some women taking Plan B One-Step® will have menstrual changes such as spotting or bleeding before their next period. Some women may have a heavier or lighter next period, or a period that is early or late. A pregnancy test should be given if a period is more than one week late. Having severe abdominal pain may be a sign of an ectopic pregnancy for which immediate medical attention is required.