Is itchiness a side effect or reaction to my oxycodone 5mg or is it from my anesthesia? i had surgery yesterday morning.

More likely Oxycodon: It is unlikely for general anesthesia to cause itchiness more than 24hrs later, unless it affected your liver. General anesthesia is usually cleared from you body rapidly, unless you have a rare enzyme deficiency. It far more likely due to oxycodone. If itchiness is diffuse, stop oxycodone and see if it resolves. You can take diphenhydramine for symptoms. Let you doctor know asap.

Side -effect.: The other side-effects of oxycodone are: drowsiness, dry mouth, confusion ,constipation, dizziness and blurring of vision. The side-effects can be exacerbated by the side-effect of anesthesia, which are somewhat similar.