Naloxone is contraindicated in neonatal resuscitation if the mother is on:

Contraindications and Precautions Newborns of mothers who are known or suspected to be physically dependent on opioids. In such cases an abrupt and complete reversal of narcotic effects may precipitate an acute abstinence syndrome. Not indicated if infant shows no sign of respiratory depression. Ref: KD Tripathi 8th ed.