Doxylamine succinate belongs to a group of medicines called ‘antihistamines’. Pyridoxine hydrochloride is another name for Vitamin B6. Folic Acid-helps to prevent neural tube defects in pregnancy. The combination of Doxylamine Succinate 10mg, Pyridoxine Hydrochloride 10mg, Folic Acid 2.5mg is a medication used to treat nausea and vomiting of pregnancy (NVP), also called “morning sickness.”