Plan B Instant

: Such as hives, difficulty breathing, or swelling of the face/throat. 3. Follow-Up for Effectiveness Plan B One-Step (1.5 mg levonorgestrel) Information - FDA

, you can report it through the following official channels: Plan B

: You can report serious adverse reactions to the FDA MedWatch Program online or by calling 1-800-FDA-1088. 2. When to Contact a Healthcare Provider : Such as hives, difficulty breathing, or swelling

: This can be a warning sign of an ectopic pregnancy (a pregnancy outside the uterus), which is a medical emergency. : Such as hives

: If you throw up within two hours of taking the pill, it may not have been absorbed, and you should contact a professional to see if you need another dose.