Congressman Henry Waxman headed back to work

Congressman Henry Waxman (D-California) attends a panel discussion on ''the Future of Health'' at the 2009 Milken Institute Global Conference in Beverly Hills, California in this April 27, 2009 file photo.

LOS ANGELES (Reuters) - U.S. Representative Henry Waxman, hospitalized in Los Angeles for a fainting spell days after spearheading House passage of a landmark climate change bill, will be back at work on Capitol Hill next week, a spokeswoman said on Thursday.

Doctors at Cedars-Sinai Medical Center, where Waxman, 69, was admitted on Tuesday after collapsing in his district office, planned to discharge the veteran California Democrat on Thursday, spokeswoman Karen Lightfoot said.

Waxman had returned to Los Angeles after leading the effort that on Friday won House passage of legislation to slash greenhouse gas emissions blamed for global warming, a major part of President Barack Obama's domestic agenda.

Waxman underwent "routine testing" while hospitalized and was feeling fine by the next day, Lightfoot said, but she offered no information about what led to his fainting spell.

"He is in good health and will be back to work in Washington next week," Lightfoot said in a statement.

Congress has been recessed all this week.

First elected to the House in 1974, Waxman became chairman this year of the powerful House Energy and Commerce Committee, which has jurisdiction over major environmental and energy legislation. He was chief sponsor of the newly passed climate change bill that bears his name.

(Reporting by Laura Isensee, editing by Steve Gorman and Mohammad Zargham)