Yes, itchiness is a common side effect of Percocet. It appears to occur because Percocet causes histamine release in some people.
Itchiness can signify an allergic reaction which can be dangerous. Other symptoms of a dangerous allergic reaction include rash, hives, difficulty breathing, dizziness, swelling of the face or hands, etc. If you have these in conjunction with your itchiness be sure to stop the Percocet and tell your doctor immediately. Most cases of itchiness when using Percocet do not involve a dangerous allergic reaction.
Since the itchiness is caused by histamine release you can try an anti-histamine and see if that helps. Unfortunately anti-histimines can have side effects of their own such as drowsiness that can be troublesome but they do work for some people.
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