| Study | Reason for exclusion |
|---|---|
| Calvo 2007 | No placebo arm |
| Kurukahvecioglu 2007 | Pre‐emptive administration |
| Nekoofar 2003 | No 4 or 6 hour data, baseline pain assessed before procedure and medication given immediately after procedure |
| Thompson 2000 | Rectal administration, no oral route |
| Yilmaz 2006 | No placebo arm |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.