Abbreviations

COX-2	Cyclo-oxygenase-2
GP	Glossopharyngeal
IM	Intramuscular
IR	Immediate-release
IV	Intravenous
NA	Not applicable
NPO	Nil per os
NRS	Numerical rating scale
NS	Not significant/ no significant difference
NSAID	Nonsteroidal anti-inflammatory drug
OR	Operating room
OSA	Obstructive sleep apnoea
PACU	Post-anaesthesia care unit
PCA	Patient-controlled analgesia
PO	Per os
POD	Postoperative day
PONV	Postoperative nausea and vomiting
PR	Per rectum
PRN	Pro re nata
RCT	Randomised controlled trial
TE	Tonsillectomy
TMD	Tramadol
VAS	Visual analogue score
VRS	Verbal rating scale

2nd World Day of Regional Anaesthesia & Pain Medicine