Hi Brenda,
As Jan and Dee said, for most of us, Ciprofloxocin is generally the "safest" antibiotic that we can take. In fact, for many/most of us, it will bring temporary remission, if we are having a flare when we take it. Unfortunately, though, we are all different in our reactions to various meds, so it's not impossible that it could trigger an MC reaction. Just about anything seems possible, with MC. Also, there is a slight possibility that you might be allergic to it.
I believe this is the thread that Jan mentioned:
http://www.perskyfarms.com/phpBB2/viewtopic.php?t=9488
Also, be aware that the fluoroquinolones, including Cipro, are associated with an increased risk of tendinitis and tendon rupture. This adverse reaction most frequently involves the Achilles tendon, but tendinitis and tendon rupture in the shoulder, the hand, the biceps, the thumb, and other tendon sites have also been reported. The risk of developing fluoroquinolone-associated tendinitis and tendon rupture is further increased if you are taking a corticosteroid drug, (such as Entocort). If you are an athlete, (especially, a body-builder, or a runner), at the first sign of tendinitis or a tendon rupture, stop what you are doing immediately, and contact your doctor.
The same day that your antibiotic treatment ends, it would probably be a very good idea to begin taking a good probiotic, and continue taking it for at least a couple of weeks, in order to minimize the risk of developing a C. diff infection. The risk of developing a C. diff infection is not nearly as great with Cipro as it is with other antibiotics, but there is still a small to moderate chance, so a probiotic is good insurance, to help minimize that possibility.
I hope that your cramps have subsided by now, (as Dee said, they could be associated with the UTI), but if they are getting worse, instead of better, you might need to contact your doctor, just in case you are intolerant of the floroquinolone family of antibiotics.
Tex