Experimental antiviral tested for painful bladder bleeding after transplant

This study aims to see if adding the antiviral drug cidofovir to standard supportive care improves symptoms of BK virus-related hemorrhagic cystitis (painful bladder bleeding) in patients who have had a stem cell transplant. Participants were randomly assigned to receive either standard care plus cidofovir or standard care alone for up to four weeks. Researchers measured whether the combination reduced virus levels and improved urinary symptoms better than standard care alone.