Peterson was taken to the hospital by ambulance after experiencing shortness of breath and swelling in the face that caused Vikings personnel to call 911. He was back with the team resting in the dorms by the time the Vikings concluded their afternoon practice shortly after 5 p.m. Central, according to head coach Leslie Frazier, who was called it a "scary moment."
Frazier said Peterson told him he had an allergic reaction to something else when he was younger, but Frazier wasn't sure if Peterson knew of his seafood allergy.
"I don't know if anyone of you has had anyone experience that, but, yeah, it was scary," Frazier said. "But he's fine now. Everything's fine."
Peterson has been on the physically-unable-to-perform list since the Vikings started training camp on Friday as he works his way back from surgery on Dec. 30 to his left knee to repair to the torn anterior cruciate and medial collateral ligaments in his left knee.
"We're anticipating him being back in rehab tomorrow, whether he's doing things in the pool or back out on the field. He's cleared to get going tomorrow," Frazier said.
In his five seasons with the Vikings, Peterson has rushed for 6,752 yards and 64 touchdowns and caught 137 passes for 1,309 yards and three touchdowns. His 67 touchdowns since 2007 is tops among NFL players and he is less than 100 yards away from becoming the Vikings' all-time leading rusher.
Rookie safety Robert Blanton tweaked a hamstring in Monday's practice.
Tim Yotter is the publisher of Viking Update. Follow Viking Update on Twitter and discuss this topic on our message boards. To become a subscriber to the Viking Update web site or magazine, click here.