Hello, Thanks for writing to us. Mox(500) is considered as safe antibiotics during pregnancy, so no problem in taking that. Viscodyne D contains Dextromethorphan which is usually not used during pregnancy as studies have shown that it causes a birth defect in animals but it has not shown any increase in birth defects in those women who had taken it during pregnancy. It is better to avoid it. One or two times of Viscodyne D syrup will not cause any birth defect so you need not worry. Take care.