If you're unlucky it can unleash an entire syndrome upon you (known as 'fluoroquinolone toxicity syndrome' aka 'floxing' or being 'floxed'). This can include 30, 40 even 50+ adverse events being experienced simultaneously and persisting for years if not forever. This class of antibiotics is known to interfere with the production of collagen as well as cause mitochondrial dysfunction which can result in everything from spontaneous tendon ruptures, joint degradation, neuropathy, vision damage, hearing loss, cognitive problems--you name it. The current warning insert for Cipro is 53 pages long and is up to I believe three black box warnings now.
Anyway, I'm one of the unlucky 'forever' cases. I've been severely disabled for over a decade now and live in constant agonizing, intractable pain. I truly wish the Cipro had just killed me. Please be extremely careful if a doctor ever tries to prescribe you Cipro again (or any of the other antibiotics in its class). They are supposed to be used in life-or-death situations only after other, less dangerous antibiotics have failed. Trust me: You do not want to end up in a wheelchair or bedridden over a UTI. It's not worth it. Many doctors still deny that Cipro even does this to people. You have to really look out for yourself out there.