A Pregnant Patient Asks the Nurse If She Can Take

A pregnant patient asks the nurse if she can take antihistamines for seasonal allergies during her pregnancy. What will the nurse tell the patient?

A) Antihistamines are contraindicated during the third trimester of pregnancy.
B) Second-generation antihistamines are safer than first-generation antihistamines.
C) Antihistamines should not be taken during pregnancy, but may be taken when breast-feeding.
D) The margin of safety for antihistamines is clearly understood for pregnant patients.