Can Babies be addicted to drugs?

Definitely. I've watched a video of that in Facebook documenting about babies passively addicted to drugs. As far as I can remember, incontrollable shaking is one of the manifestations. Side effects of it can also be premature labour and slew of congenital disease risks

Yes if the baby is exposed to drugs while in the womb: https://ph.theasianparent.com/newborns-addicted-to-drugs/