"She basically had an adverse reaction to some medication she was taking and she blacked out," spokeswoman Amy Hawkes said.
Osmond, who lives in Utah County about 30 miles from Salt Lake City, spent a couple of days at Timpanogos Regional Medical Center in Orem last week, Hawkes said.
"She's doing fine. She's vacationing with her family right now," she said.
The National Enquirer reported in its Aug. 14 edition that Osmond's hospitalization was the result of a failed suicide attempt.
"We deal with those tabloids all the time," said Karl Engemann, Osmond's manager. "You get tired of responding. It's like punching Jell-O."
He would not say what kind of medication she was taking or what it was for.
A message left at the National Enquirer's offices after regular business hours Wednesday was not immediately returned.