It is not known whether Percocet is harmful to an unborn baby, but it could cause breathing problems or addiction/withdrawal symptoms in
a newborn . Before you take Percocet
, tell your doctor if you are pregnant or plan to become pregnant during treatment. Acetaminophen and oxycodone may pass into breast milk and could harm a nursing baby. Do not use Percocet without telling your doctor if you are breast-feeding a baby.