Fluoroquinolone antibiotics can cause several new adverse reactions according to reports from the FDA and EMA, including blood sugar disturbances, mental health issues like attention problems and delirium, and a small increased risk of aortic aneurysm. The document warns that fluoroquinolones should be used cautiously in elderly patients, those with renal failure, organ transplant patients, and those who have experienced the reported adverse effects. Medical professionals are instructed to stop fluoroquinolone use if any of these adverse effects present and to document individual cases. Local applications of fluoroquinolones like eye drops are considered safe.