We reported two cases of nursing in dogs that showed noticeable adverse effects after opioid administration(fentanyl or morphine)for anesthesia. Case 1 was a 5 -year-old casted male miniature dachshund, weighing 4.7 kg and with a body condition score(BCS)of 4 /9. It was administered fentanyl at a constant rate infusion for anesthesia and pain management during and after hemilaminectomy. It showed notable salivation and bradycardia post-surgery. Case 2 was a 3 -year- old intact female Shih Tzu, weighing 5.9 kg and with a BCS of 4 /9, that received intravenous morphine for pain management. It presented with significant salivation, bradycardia, and decreased body temperature after cystotomy. We wiped the saliva frequently off the coat and skin and padded the inside of the Elizabeth collar to maintain the coat around oral cavity dry and clean. We dealt with the hypothermia by placing an electric heating pad into the hospital cage, with careful prevention of low temperature burn in the wet environment. For the bradycardia, heart rate, arterial blood pressure, and color of the visible mucous membrane were continuously monitored. The significant adverse effects caused by the opioid administration were safely managed in both cases by nursing interventions for maintaining good hygiene, normal
body temperature, and normal cardiovascular function.
