Are you saying that Cipro may cause tendon ruptures?
I am allergic to penicillin and any of its relatives, so I am given Cipro by doctors and dentists.
Yes, especially in people over 60: “fluoroquinolone-associated Achilles tendon rupture”.
http://www.medscape.com/viewarticle/410546_3
Cipro is probably not the best choice for an emergency kit once you get to my age or older (although I would certainly use it in a life and death situation).