Postcastration analgesia in ponies using buprenorphine hydrochloride.
Authors: Love E J, Taylor P M, Whay H R, Murrell J
Journal: The Veterinary record
Summary
# Editorial Summary: Postcastration analgesia in ponies using buprenorphine hydrochloride Following its recent UK licensing for equine use, buprenorphine's prolonged analgesic action presents a practical opportunity for improving postoperative pain management in equine surgery. Love and colleagues conducted a randomised, observer-blinded trial administering either 0.01 mg/kg intravenous buprenorphine or placebo to ponies undergoing castration, measuring pain responses using dynamic interactive visual analogue scores (DIVAS) and a Simple Descriptive Scale at regular intervals over 24 hours post-anaesthesia. Ponies receiving buprenorphine demonstrated substantially lower pain scores throughout recovery, with median DIVAS areas under the curve of 63 compared to 209 mm hour in controls (P=0.0348), and only three buprenorphine-treated animals required rescue analgesia versus five in the control group. For practitioners managing postoperative equine pain, these findings suggest a single pre-anaesthetic buprenorphine dose offers near-complete pain relief following castration without adverse effects, potentially reducing reliance on additional analgesic dosing during the critical early recovery period.
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Practical Takeaways
- •Buprenorphine at 0.01 mg/kg given IV before castration surgery provides effective postoperative pain relief in ponies with minimal rescue analgesia requirements
- •This drug represents a practical option for equine practitioners seeking longer-lasting analgesia after routine surgical procedures
- •The safety profile supports consideration of buprenorphine as part of perioperative pain management protocols for equine castration
Key Findings
- •Buprenorphine 0.01 mg/kg IV premedication reduced postoperative pain scores (DIVAS median 63 vs 209 mm·hour, P=0.0348)
- •Simple Descriptive Scale pain scores were significantly lower in buprenorphine group compared to control (P=0.038)
- •Only 3 of buprenorphine-treated ponies required rescue analgesia versus 5 in control group
- •Buprenorphine produced no serious adverse effects in this study population