** Thanks for contacting with your health concern 1. As you are pregnant so must be under the supervision of your physician so remain under constant observation and do not change or stop any drug without first consulting with your attending doctor, I at most can let you know about general rules to be followed while prescribing to pregnant patients: i. In early pregnancy [as in your case], avoid any medications except Iron, calcium, paracetamol, and antacids. ii. No newly introduced drugs should be given during pregnancy, only those drugs, whose safety has been established over years, should be prescribed. iii. Avoid antithyroid, cytotoxic drugs, anticoagulant drugs. iv. In late pregnancy, do not give aspirin [bleeding tendency], sulpha [neonatal jaundice], tetracyclines [stains teeth], chloromycetin [gray baby syndrome], aminoglycosides [deafness] 2. allergic problems [allergic rhinits] are one of the potentially serious illness complicating pregnancy, so although the first approach should be avoidance of allergen, however, if environmental modification is ineffective then the pharmacological agents should be chosen, as such - Antihistamines [diphenhydramine] are given in such conditions since the benefits from their use greatly outweighs against any risk to the fetus. [and provide definite benefit during pregnancy], - an inhaled corticosteroid nasal spray ( beclomethasone) have not been incriminated as teratogens and are commonly used by pregnant women who have an allergic problem since it lessens the need for oral medications. PS. It is extremely important to monitor closely any allergic problems during your pregnancy and if one follows her doctor s instruction carefully both mother and baby have a good outcome.