. Author manuscript; available in PMC: 2014 Nov 16.

Published in final edited form as: Cochrane Database Syst Rev. 2010 Sep 8;(9):CD007396. doi: 10.1002/14651858.CD007396.pub2

Analysis 4.3. Comparison 4 Diamorphine + prochloprerazine versus pethidine + prochloprerazine, Outcome 3 Additonal analgesia required.

Review: Parenteral opioids for maternal pain management in labour

Comparison: 4 Diamorphine + prochloprerazine versus pethidine + prochloprerazine

Outcome: 3 Additonal analgesia required