Fluoroquinolones are antibiotics with names ending in “-oxacin”. Ciprofloxacin, levofloxacin, moxifloxacin and ofloxacin are available in the UK. These antibiotics are used to treat serious and life-threatening infections. However, they may affect the muscles, joints, tendons and nerves. These side-effects have led to long-lasting or permanent disability in a very small number of patients.