Again, it is the most important to do a antibiotic sensitivity study by microbiology before trying to prescribe...................

Cipro actually has its problems. It is not used in children, due to a higher incidence of seizures for one reason. My mother actually had a grand mal seizure after taking it. For me, I would avoid taking it unless there was nothing else available to me, and then I would be very cautious with it.

Yes, I've read that if the patient is allergic to penicillin, they usually have a cross sensitization to cephalosporin(sulfa drugs)

I think the cross-sensitivity issue has to do with the type of reaction one has to PCN (or any other drug for that matter).

I also think you might get more complete responses from pharmacy-type folks!