The Magpies are yet to make a decision regarding the fitness of Loic Remy, who has been sidelined with an ankle injury since March 5.
"We certainly looked like we needed some freshening up," Chronicle Live quotes Pardew as saying. "I will have to look at that against Man United.
"We don't want our season to fizzle out. We have ourselves in a position now after two big defeats where we have to have a big response."
Newcastle have six games left to play in their campaign.