A.C.
Both Tylenol and Benadryl are Type B medications, meaning that minimal amounts of the drug pass on to the baby, and in animal studies they have been shown to be harmless (but there are not sufficient studies in humans to guarantee their safety). That's the scientific bit, but the general consensus is that both medications are safe to take when pregnant, especially once you are past your first trimester. Both of my OBs have recommended them as very gentle and good for getting the job done, and I used it occasionally in my first pregnancy without any side effects. Good luck.