Within the package insert for Ciprofloxacin regarding Tendon Effects we find the following which appears to be consistent amongst all the fluoroquinolones:
�Ruptures of the shoulder, hand, and Achilles and other tendon ruptures tendon or other tendons that required surgical repair or resulted in prolonged disability have been reported in patients receiving quinolones, including Ciprofloxacin. Post-marketing surveillance reports indicate that the this risk may be increased in patients receiving concomitant corticosteroids, especially in the elderly. Ciprofloxacin should be discontinued if the patient experiences pain, inflammation, or rupture of a tendon. Patients should rest and refrain from exercise until the diagnosis of tendonitis or tendon rupture has been excluded. Tendon rupture can occur during or after therapy with quinolones, including Ciprofloxacin.�