In Thailand, most pregnant women who had
nausea and vomiting in first trimester were given dimenhydrinate
for the treatment. The undesirable side
effect of dimenhydrinate is drowsiness. There were
studies that compared ginger and dimenhydrinate
only in motion sickness(12,13). The authors would like to
evaluate the efficacy of ginger and dimenhydrinate in
the treatment of nausea and vomiting in pregnancy.