Nausea and vomiting in early pregnancy is a common condition at risk to be minimized by women or care providers. If not treated in the early stages, it can evolve to a severe condition with a morbidity risk for the mother and/or the fetus, and expose to public health consequences. Severe forms of nausea and vomiting and hyperemesis gravidarum are a clinical diagnosis with nonspecific manifestations in addition to biologic and metabolic consequences for mother and/or child. Safe and effective treatments can prevent severe consequences if used in an early stage of symptoms.