Welcome to HCM,
You should understand it is called physiological Jaundice
and it is not having harmful effects in newborns.That is why it is called physiological.
In my opinion the drug in question will not be helpful in preventing jaundice, physiological jaundice improves easily with Phototherapy
or exposure to sunlight.
The drug in question is a herbal drug and there are no authentic scientific studies are there hence will not be able to comment on that.
The idea of taking this drug during pregnancy
to prevent physiological jaundice seems unnecessary in my view.
As such also we do not want to take unnecessary drug during pregnancy.
In case someone is taking such drug please bring it to notice of your Gynecologist.
Please take care