Certain medications can make levonorgestrel less effective as an emergency form of contraception.
Studies have shown that women over 176 pounds may have especially limited success with Plan B One-Step.
Plan B is a single-dose tablet.
It's recommended that you don't drive a vehicle or do anything else that requires you to be alert until this passes.
Ask a doctor or pharmacist before taking levonorgestrel if you regularly use medication for , , or.
This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment.