Sen. Tim Johnson (D-S.D.) was released from the hospital on Thursday after undergoing surgery earlier this week to remove his gallbladder.

Johnson was released after being hospitalized on Sunday with a fever due to an adverse reaction to antibiotics. After further observation, he underwent surgery to remove the gallbladder in Sioux Falls.

"Senator Johnson is doing remarkably well and was released from the hospital earlier today with instructions to take it easy while he continues to recover," said Dr. Scott Beckstrand.

Beckstrand said that it may take a few weeks before the senator, who's suffered previous, unrelated health difficulties, will be able to resume his full schedule.

“I’m glad to finally be home and on the mend,” Johnson said in a statement.

Another one of Johnson's Senate colleagues, Majority Whip Dick Durbin (D-Ill.), was also sidelined with surgery this week. Durbin had a small tumor removed from his stomach.