What is the risk of ankle- tendon rupture in an 87 yr. old female being treated for UTI with Ciprofloxacin 250mg./twice a day? She also takes Boniva, Gabapentin, Prednisone and Simvastatin. She has had recurring UTI , with no early symptoms, the past couple years-- and was hospitalized previously for UTI, -with sepsis- several months ago. ..She does drink plenty of water, while taking the Ciprofloxacin, but finds it difficult due to urinary incontinence condition.