Welcome to HCM,
I can understand your concern as your wife is pregnant,there is nothing to worry she is given hormone gestofit which is progesterone
which help to sustain pregnancy
specially if there is any history of miscarriage
in past or any thing too suggest threat like bleeding.
Usually early pregnancy is associated with nausea and vomiting so anti emetic is given.
is given to prevent any neural tube defects in fetus.
I presume there is nothing serious so do not worry and if there is any doubt please discuss with your treating Gynecologist.
Best Of Luck.