A new digital book authored by Politico's Mike Allen and Evan Thomas contends Gov. Perry popped pain pills for his back just before his televised debates.
The e-book is called "Inside the Circus" and its release date was set for Tuesday.
In a statement, Perry's former campaign communications chief Ray Sullivan told the 24 hours news website "The Daily Caller" that the book's claims were "false, unsubstantiated and ultimately harmful to the political and electoral process.
Sullivan also said "Politicos's e-book is a low irresponsible, unsourced and unfounded reporting, with an anonymous untruths about Gov. Perry's debate performance.