Westbrook was cleared to play after recovering from two concussions and is expected to return Sunday against the Denver Broncos.
The former All-Pro running back has played in just six games this season.
Coach Andy Reid said Wednesday that Westbrook did "perfect" on his testing and is "ready to roll" for the NFC East-leading Eagles (10-4).
"Unless there's a setback, I think that's what he's counting on, the doctors and everybody else," Reid said.
Westbrook missed the past five games after suffering his second concussion in three weeks on Nov. 15 against San Diego.
His first career concussion came against Washington on Oct. 26. Westbrook sat out two games before returning prematurely against the Chargers.
"I don't think it's fair to him to throw him in every snap," Reid said. "I'm just concerned about him not having played in games, getting up on game speed."
Westbrook, once the key weapon in Philadelphia's offense, has just 225 yards rushing and 156 yards receiving in six games. The Eagles are just 3-3 when Westbrook has played.
"He's a great player," Reid said. "He's one of the smartest players I've ever coached. He brings leadership out there."
Even without Westbrook, the Eagles have been prolific at times on offense. They're second in the NFL behind New Orleans in scoring, averaging 28.5 points per game.
Quarterback Donovan McNabb is having an outstanding season and dynamic wide receiver DeSean Jackson has replaced Westbrook as the top playmaker. Jackson has 11 touchdowns this season, including eight that were 50-plus yards.
Adding Westbrook gives Philadelphia another option and forces defenses to be aware of another threat. The 30-year-old Westbrook is the franchise's career leader in yards from scrimmage.
"It's great timing for us because he'll be able to get two games to get his legs under him," McNabb said. "Just his presence back there and the things he's capable of doing will help us."