Adacel and Pregnancy
No adequate studies have been performed on pregnancy and Adacel. However, it is recommended that women receive this vaccine during each pregnancy to help prevent spreading whooping cough to the newborn.
Adacel® (Tdap vaccine) is a booster vaccine for pertussis (whooping cough), diphtheria, and tetanus in people ages 11 to 64. Because giving Adacel to a pregnant woman can help prevent whooping cough in the newborn, it is recommended that women get this vaccine once during each pregnancy.
The U.S. Food and Drug Administration (FDA) uses a pregnancy category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category C is given to medicines that have not been studied in pregnant humans but do appear to cause harm to the fetus in animal studies. Also, medicines that have not been studied in any pregnant women or animals are automatically given a pregnancy Category C rating.
This vaccine has not been adequately studied in pregnant animals or humans. Preliminary studies in rats did not suggest that the vaccine caused any problems when given during pregnancy and breastfeeding.
Although most people should receive only one dose of Adacel, there is one exception. It is recommended that pregnant women receive a dose with each pregnancy, even if they have received the vaccine previously. Ideally, it should be given sometime between 27 and 36 weeks of pregnancy, although it can be given any time.
Try not to wait until the very end of pregnancy in order to get this vaccine, as it takes about two weeks to start working. If, for some reason, you did not get vaccinated before or during pregnancy, it is also acceptable to receive this vaccine after having your baby (even if you are breastfeeding), although this is not ideal.