Marilyn Manson's concert in Houston on Saturday night was interrupted after the 49-year-old collapsed during the gig's early part, according to the NME magazine.
The incident took place as Manson performed a cover of The Eurythmics' hit "Sweet Dreams Are Made Of This".
A YouTube video showed him suddenly falling down and then coming to rest on one of the stage monitors.
Manson reportedly told fans he was suffering from "heat poisoning" shortly before the incident. On his Twitter page, he thanked "amazing" Houston audience for "being understanding", adding that he "ended up in doctor's care."