Email this page To: From: Subject: Message: Codeine - Learn more about codeine, an opioid medication used to treat pain. It is also used to suppress cough. Review side effects and special instructions. - https://www.stjude.org/treatment/patient-resources/caregiver-resources/medicines/a-z-list-of-medicines/codeine.html A summary of this page will be sent along with your message I am a referring physician Yes, I would like to receive email updates. Send Email Your message has been emailed successfully. Thank you for your interest in St. Jude Children's Research Hospital.