Postoperative Pain | A Comparison of Targinact vs. Oxycodone on Gut Function After Colorectal Surgery

Postoperative Pain research study

What is the primary objective of this study?

Two key requirements for discharge from hospital after major abdominal surgery are adequate oral analgesia and resumption of oral nutrition. Up to 40% of patients suffer delayed discharge after abdominal surgery due to delayed return of gut function, manifesting as nausea, vomiting, constipation and abdominal distension. Opiates and their derivatives are the mainstay of postoperative analgesic regimens after abdominal surgery and are highly effective in achieving adequate pain control. However, opioids cause impaired gut function by reducing normal forward propulsion and increasing gut spasm. Opioid receptor blockers such as Alvimopan counteract these effects and can accelerate postoperative gut recovery but are expensive and cause cardiac complications; alternative painkillers such as non-steroidal anti-inflammatories are less effective than opioids and have been linked with increased risk of anastomotic leaks. Targinact is a combination of prolonged release opioid analgesic (oxycodone hydrochloride) and naloxone hydrochloride (an opioid receptor blocker). The formulation of the product confines the naloxone action to the gut to reduce the unwanted side-effects on gut function. Targinact has been shown in patients with chronic severe pain to provide comparable analgesia to other opioid analgesics whilst reducing the unwanted side-effect of constipation. The Investigators wish to test the hypothesis that Targinact will provide adequate analgesia after colonic resection with reduced postoperative gastrointestinal dysfunction. The surgical procedure chosen to test this hypothesis is laparoscopic segmental colectomy, a consistently reproducible intervention with a postoperative gut dysfunction rate of up to 40% (prospective data from the Edinburgh Colorectal Unit). The main outcome of the study will be return of normal gut function at the time of planned discharge (Day 3).

Who is eligible to participate?

Inclusion Criteria: - Patients scheduled for elective laparoscopic segmental colectomy at the Colorectal Surgery Unit, Western General Hospital, Edinburgh. Exclusion Criteria: - Pregnancy Age <18 years Patients lacking capacity to give informed consent. Severe liver dysfunction (Child's A or greater) Patients participating in another therapeutic clinical trial Contraindication to oxycodone, naloxone or Targinact Pre-existing dependence on opioid analgesia (current medications will be checked prior to discussing consent) Pre-existing use of opioid analgesia for chronic pain (current medications will be checked prior to discussing consent) Patients with rectal cancer Plan to form any stoma during procedure

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?

Postoperative Pain

Postoperative Nausea and Vomiting

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Drug:TarginactPost-operative analgesia

Drug:OxycodonePostoperative analgesia

Procedure:Laparoscopic segmental colectomy

Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

TarginactOral Targinact 10-20mg bd following laparoscopic segmental colectomy

OxycodoneOral oxycodone 10-20mg bd following laparoscopic segmental colectomy

Study Status


Start Date: October 2014

Completed Date: August 2015

Phase: Phase 3

Type: Interventional


Primary Outcome: Prevalence of Postoperative Gut Dysfunction

Secondary Outcome: Total Opioid Analgesia Consumption

Study sponsors, principal investigator, and references

Principal Investigator: Hugh M Paterson, MD FRCS

Lead Sponsor: University of Edinburgh


More information:

Lassen K, Soop M, Nygren J, Cox PB, Hendry PO, Spies C, von Meyenfeldt MF, Fearon KC, Revhaug A, Norderval S, Ljungqvist O, Lobo DN, Dejong CH; Enhanced Recovery After Surgery (ERAS) Group. Consensus review of optimal perioperative care in colorectal surgery: Enhanced Recovery After Surgery (ERAS) Group recommendations. Arch Surg. 2009 Oct;144(10):961-9. doi: 10.1001/archsurg.2009.170. Review.

Discuss Oxycontin