The former Doctor Who star is said to have fallen from a live horse during a matinee show that took place at Glasgow's Scottish Exhibition and Conference Centre (SECC) earlier today (January 4).
According to stv, the actor was taken to Western Infirmary hospital as a precaution after complaining of back pain.
A cast member reassured the audience in attendance that the Glasgow-born actor, performer and presenter had "no broken bones, just bruises".
A spokeswoman for the SECC added that Barrowman's understudy and cousin Greg Barrowman had stepped in to finish the rest of the show.
Starring alongside Barrowman in the production - due to end its run on Sunday, January 6 - are Scottish comedy duo the Krankies.
Janette Tough - 'Wee Jimmy Krankie' - only returned to performing two years ago after she was almost killed following an on-stage panto accident in 2004.
Tough suffered a fractured skull after falling from a mechanical beanstalk at the Pavilion Theatre, but has since made a full recovery.