Of the currently available preparations, chlorpheniramine has been recommended as the first generation antihistamine of choice for
use during pregnancy. Based on the information available, loratadine or cetirizine may be considered the second generation antihistamines of choice. Pseudoephedrine is a nasal decongestant which can be used for allergic rhinitis. Glucorticoids when used locally is also safe in pregnancy. You need to consult gynecologist before starting above drugs.