Cat Acting Strange After Buprenorphine. Anesthesia lingers in her system for about a day after the surgery, so she may be groggy, dizzy and unwilling to eat at first. Also you should know benadryl for cats and how to give them to a cat.

Buprenorphine is usually not associated with nausea, delirium, or strange behavior changes in cats. Opioids are strong painkillers that block receptors in the brain and nervous system that signal when a part of the body is injured. Since getting on the medication she has been lethargic, confused, and in general acting strange.