Senator Robert Byrd Readmitted to Hospital Due to Reaction from Antibiotics

On March 5, he was readmitted because of his reactions to antibiotics and the need for tests to determine a different course of medication, a statement from his office said.

Sen. Robert C. Byrd, the longest-serving senator in U.S. history, is back in a hospital for tests after a reaction to antibiotics.

Spokesman Jesse Jacobs says doctors want to run tests to determine which medicine is best to treat Byrd for his reaction to drugs taken for a urinary tract infection.

Byrd's office is not saying which hospital the 90-year-old Democrat is in. His stay is expected to be brief.

In March, he was admitted for a reaction to an antibiotic and a week before that for a fall at his home.