Nicole Richie Treated for Dehydration
According to E! Online, Richie, 25, was examined by a doctor on the set of the E! reality series and then taken to a nearby hospital.
She was given intravenous fluids for 15 minutes and then released.
"Nicole is home resting and will return to work this evening," her rep said in a statement. "We are proud of the weight that Nicole is gaining and her focus on her health."
Richie announced in October that she seeking treatment for what her rep described as an inability to put on weight.
"She is working with a team of doctors and specialists whose focus is nutrition," her rep told PEOPLE in a statement. "It is important to Nicole that she achieves this goal in a healthy way as this is not a treatment for an eating disorder."
A month later, friends said they saw an improvement, with one source close to Richie telling PEOPLE, "She has [put on] at least 5 lbs. She wants to prove she's trying to change."
The upcoming season of The Simple Life, the show's fifth, features Richie and Paris Hilton working as camp counselors, according to E!