: 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.
: 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 Plan B
: This can be a warning sign of an ectopic pregnancy (a pregnancy outside the uterus), which is a medical emergency. : If you throw up within two hours
: Seek help for unusually heavy vaginal bleeding that is not your period. it may not have been absorbed