Kristy Swanson was in the hospital over the weekend for coronavirus treatment, The Los Angeles Times reported.
Swanson, 51, said she has pneumonia and is on oxygen.
She announced her condition on Twitter Monday writing, “Prayers for me please. Yesterday, I took an ambulance ride to the hospital.”
The actress added that she was at the end of her illness when the illness settled into her lungs. She is being treated with baricitinib and blood thinners to prevent clotting.
According to The New England Journal of Medicine, baricitinib has been tested as a treatment and used with remdesivir in some cases to reduce recovery time in adults who are also on high-flow oxygen. Baricitinib is traditionally used to treat patients with rheumatoid arthritis and was approved last year to be used with remdesivir to treat COVID-19. It received emergency use approval in July to be used on its own, the Times reported.
It is not known if Swanson was vaccinated against COVID-19, People magazine reported. She has Tweeted against the vaccine mandates saying they were a way to “make mo-money” but she denies being “anti-vax” as some media outlets have characterized her vaccine stance.
Through the years GROWING PAINS - "Thank God It's Friday" - Airdate: February 10, 1987. (Photo by ABC Photo Archives/Disney General Entertainment Content via Getty Images)
KIRK CAMERON;KRISTY SWANSON (ABC Photo Archives/Disney General Entertainment Con)
Through the years Kristy Swanson and Christopher Atkins during Christopher Atkins at Searle Charity Tennis Invitational - October 23, 1988 at Industry Hills Restort in Los Angeles, California, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images) (Ron Galella/Ron Galella Collection via Getty)
Through the years Actress Kristy Swanson attends the 'Buffy, the Vampire Slayer' Westwood Premiere on July 29, 1992 at Mann Village Theatre in Westwood, California. (Photo by Ron Galella, Ltd./Ron Galella Collection via Getty Images) (Ron Galella, Ltd./Ron Galella Collection via Getty)
Through the years 1992: American actor Kristy Swanson. (Photo by Francesco Da Vinci/Hulton Archive/Getty Images) (Francesco Da Vinci/Getty Images)
Through the years 7/2/96 La,CA Billy Zane and Kristy Swanson at the Premier of "Phantom" (Albert Ortega/Getty Images)
Through the years Actress Kristy Swanson, star of the new thriller 'Soul Assassin,' at a photocall at the Cannes Film Festival, France. A string of movies tipped for box office success will be officially unveiled at the glamorous two-week festival. * which is expected to attract about 40,000 people. (Photo by Anthony Harvey - PA Images/PA Images via Getty Images) (Anthony Harvey - PA Images/PA Images via Getty Images)
Through the years Singer Lance Bass (L) of "N Sync" and his girlfriend Kristy Swanson arrive at the film premiere of "Band Of Brothers" August 29, 2001 Los Angeles, CA. (Photo by Frederick M. Brown/Getty Images) (Frederick M. Brown/Getty Images)
Through the years Actress Kristy Swanson attends a special screening of "Die Another Day" on November 11, 2002 in Los Angeles, California. The film opens in theaters nationwide on November 22, 2002. (Photo by Jon Kopaloff/Getty Images) (Jon Kopaloff/Getty Images)
Through the years (L-R) Actor Kristy Swanson, ice skater Dorthy Hamill, TV host Randy Jackson and singer Deborah Gibson attend the Fox Winter TCA Party at Citizen Smith on January 17, 2006 in Hollywood, California. (Photo by Stephen Shugerman/Getty Images) (Stephen Shugerman/Getty Images)
Through the years Actress Kristy Swanson arrives at the BAFTA/LA-Academy of Television Arts and Sciences Tea Party at the Century Hyatt on August 26, 2006 in Century City, California. (Photo by Michael Buckner/Getty Images) (Michael Buckner/Getty Images)
Through the years Actress Kristy Swanson arrives at the BAFTA/LA-Academy of Television Arts and Sciences Tea Party at the Century Hyatt on August 26, 2006 in Century City, California. (Photo by Michael Buckner/Getty Images) (Michael Buckner/Getty Images)
Through the years Actress Kristy Swanson attends the Third Annual Los Angeles Gala for the Christopher and Dana Reeve Foundation at the Century Plaza Hotel on June 6, 2007 in Los Angeles, California. (Photo by Frederick Brown/Getty Images) (Frederick M. Brown/Getty Images)
Through the years Actress Kristy Swanson (L) and her family attend the "Fly Me To The Moon" film premiere at the Directors Guild of America on August 3, 2008 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images) (Frederick M. Brown/Getty Images)
Through the years Actress Kristy Swanson and Paul Teutel arrive at "A Night of Honour" Hosted By Dr. Phil McGraw at the Universal Hilton Hotel on October 4, 2009 in Universal City, California. (Photo by Mark Davis/Getty Images) (Mark Davis/Getty Images)
Through the years Actress Kristy Swanson appears at the Fangoria Trinity of Terrors festival at the Palms Casino Resort October 31, 2009 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) (Ethan Miller/Getty Images)
Through the years Actress Kristy Swanson arrives at Comedy Central's Roast of Charlie Sheen held at Sony Studios on September 10, 2011 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images) (Frederick M. Brown/Getty Images)
Through the years Actress Kristy Swanson attends Hallmark Channel & Hallmark Movie Channel's 2014 Winter TCA Party at The Huntington Library and Gardens on January 11, 2014 in San Marino, California. (Photo by Frederick M. Brown/Getty Images) (Frederick M. Brown/Getty Images)
Through the years Kristy Swanson attends the Salute To Heroes service gala to benefit The National Foundation For Military Family Support at The Majestic Downtown on March 14, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images for NFMFS) (Jason Merritt)
Through the years CHICAGO, IL - AUGUST 21: Actress Kristy Swanson throws out the ceremonial first pitch before the game between the Chicago Cubs and the Atlanta Braves on August 21, 2015 at Wrigley Field in Chicago, Illinois. (Photo by David Banks/Getty Images) (David Banks/Getty Images)
Through the years Kristy Swanson attends the 16th Annual Waiting for Wishes Celebrity Dinner Hosted by Kevin Carter & Jay DeMarcus on April 18, 2017 in Nashville, Tennessee. (Photo by Terry Wyatt/Getty Images for The Kevin Carter Foundation) (Terry Wyatt)
Through the years Kristy Swanson and Dean Cain arrive to the Hallmark Channel and Hallmark Movies and Mysteries Winter 2018 TCA Press Tour held at Tournament House on January 13, 2018 in Pasadena, California. (Photo by Michael Tran/Getty Images) (Michael Tran/Getty Images)
Through the years "Rock Bottom" -- The tension between Jason and Ray comes to a head, and Lisa faces her final test in officer candidate school, on SEAL TEAM, Wednesday, May 1 (10:00-11:00 PM, ET/PT) on the CBS Television Network. Pictured L to R: David Boreanaz as Jason Hayes and Kristy Swanson as Julia Logan. (Photo by Cliff Lipson/CBS via Getty Images) (CBS Photo Archive/CBS via Getty Images)