Pregnant women in their first and early second trimesters may experience nausea
and vomiting, commonly referred to as "morning sickness." It is estimated that
nausea affects between 70 and 85% of pregnant women and vomiting approximately
The evidence suggests that anti-emetic medication (particularly antihistamines
and vitamin B6) reduce the frequency of nausea in early pregnancy by
There have been relatively few studies reporting on side effects of antiemetics
and foetal outcomes such as growth and congenital malformations.