Joe Perry of Aerosmith left his performance at Billy Joel’s Madison Square Garden show on a stretcher after collapsing backstage.

According to TMZ, after Perry played “Walk This Way” with Joel onstage, he “looked terrible” after collapsing in his dressing room. Paramedics arrived, put a tracheal tube down his throat to clear his airway, and took Perry to the hospital on a stretcher with oxygen.

Sources say that Perry, 68, has been having “breathing issues for the last few weeks and it came to a head last night,” noting that it could be due to congestion in the lungs. He is reportedly still in the hospital but is awake and responsive.

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Perry had to cancel an appearance last night at a rock fantasy camp in Florida, but is due to begin a string of shows throughout December, making stops in Iowa, Illinois, New York, Philadelphia, North Carolina, and California. He is also set to perform alongside members of Aerosmith for the 18-date “Deuces Are Wild” Las Vegas residency next April in honor of the group’s 50th anniversary.

He explained in an interview with Ultimate Classic Rock that although a farewell tour is expected, “every show could be the last show.”

“You just don’t know…. I always have this attitude, it’s gotta be as good as it can be that day,” he said. “That said, we don’t have a day planned where we say, ‘Okay, this is the last show.’ You can’t picture that. On the other hand, I know there will be a last show just like there’s a one last time for everything in life.”

Visit Ticket Club to find tickets to see Joe Perry on tour through 2018 and in Las Vegas in 2019