What are the possible side effects of Herceptin?
Herceptin can cause harm to the fetus when taken by a pregnant woman. This may be related to a lowering of amniotic fluid levels in the second and third trimesters. You should use effective contraceptive methods while receiving Herceptin and for at least 6 months after you finish taking Herceptin. Talk to your doctor if you are pregnant or become pregnant while taking Herceptin. If you are pregnant and receiving Herceptin, consider joining the MotHER Herceptin Pregnancy Registry by calling 1-800-690-6720. By joining this registry, you can help others understand the effects of taking Herceptin while pregnant.