This only involves one class of antibiotics, but it includes Cipro, which I know some of our people are on or go on from time to time. Something about that class of antibiotics can increase your chances of getting tendon inflamation and even, it seems, tears. Weird that an antibiotic could do that, but there you have it. Make sure you keep on alert if you are taking that class of antibiotics and go easy on yourself. You better put off the long distance jumping and rugby for a while too.