Thanks for the query.
Some amount of morning sickness
is common in pregnancy
. But as your wife is having severe morning sickness, better to consult gynecologist once and get examined to find out the cause for her hyperemesis gravidarum
She can take antacids like zelucil that can give some relief from the esophageal tear.
She can go for anti-emetics with combination of pyridoxine
and doxinate, that can possibly give relief.