Ella can prevent conception when taken within 5 days of unprotected intercourse.
In comparison, Plan B should be taken within 3 days of unprotected intercourse.
Side effects of Ella, similar to those of Plan B, include: headache, nausea, abdominal pain, pain/discomfort during menstruation (dysmenorrhea), fatigue, and dizziness.
The drug should not be taken by women who are pregnant or nursing.
Similar to Plan B, Ella DOES NOT cause abortion, only the prevention of ovulation.
Plan B is available over the counter. Ella requires a prescription.
I would strongly recommend using either product if you have unprotected intercourse, forget to take your pill, or if the condom breaks, etc.