The publicist says it's possible Grammer's medication led to his symptoms. At the time, the actor was in town to promote his new film, "Swing Vote."
The "Live with Regis and Kelly" show said Grammer, 53, canceled his Tuesday morning appearance.
Nearly two months ago, the former "Cheers" and "Frasier" star suffered a mild heart attack in Hawaii, where he lives, while paddle-boating with wife Camilla.
Slideshow archive | Local events | Contests | Headlines at a glance