Doctors have been using medications to treat the 94-year-old actress at home after she declined to have the leg amputated when blood flow suddenly stopped, publicist John Blanchette said.
"We don't expect her to get better," said Gabor's husband, Frederic Prinz von Anhalt. "She will be in bed for the rest of her life."
Gabor has been receiving nutrition through a feeding tube and doesn't want any additional surgeries, he said.
Most of Gabor's right leg was amputated in January because of gangrene.
Gabor has been hospitalized repeatedly since July, when she broke her hip in a fall from bed.
She appeared in films ranging from "Moulin Rouge" in 1952 to "Queen of Outer Space" in 1958. She also appeared on TV specials and game shows, and guest-starred on various TV series, often playing herself.