Quitting Painkillers While Pregnant; Treatment for Opioid Addiction. pregnant woman taking painkillers NAS can occur when a pregnant woman takes opioids, such as 5: Codeine. Oxycodone (OxyContin, Percocet). Methadone. . Jones, H. E., Martin, P. R., Heil, S. H., Kaltenbach, K., Selby, P., Coyle, M....