Codeine: An Under-Recognized and Easily Treated Cause of Acute Abdominal Pain.Tabner A, Johnson G.Am J Emerg Med. 2015 May 1.

Single dose oral ibuprofen plus codeine for acute postoperative pain in adults. Derry S, Karlin SM, Moore RA. Cochrane Database Syst Rev. 2015 Feb 5;2:CD010107.

Codeine should not be prescribed for breastfeeding mothers or children under the age of 12. Lazaryan M, Shasha-Zigelman C, Dagan Z, Berkovitch M.Acta Paediatr. 2015 Jun;104(6):550-6.