Nausea and vomiting in pregnancy can have serious adverse effects on the quality of a woman's life, affecting her occupational, social, and domestic functioning, and her general well-being; therefore, it is very important to treat this condition appropriately and effectively. Evidence-based algorithms support the use of oral pyridoxine alone or combined with doxylamine as first-line treatment. Promethazine or dimenhydrinate, known as a second-line treatment, should be added to the first-line treatment or should be added only to pyridoxine according to different algorithms. In most of the world, there is a lack of approved medicines using this combination approach known as the first-line treatment. Therefore, compounding pharmacists should supply the demand by compounding 10-mg pyridoxine hydrochloride and 10-mg doxylamine succinate slow-release capsules. Since transdermal promethazine does not exist world wide, and, since this medicine has significant added values compared to the oral/rectal dosage forms, compounding pharmacists should offer physicians transdermal promethazine as a second-line therapy in nausea and vomiting in pregnancy. This review summarizes the nausea and vomiting in pregnancy problems and discusses the compounding opportunities that exist in this common and wide-spread pathology in order to improve a woman's quality of life.
