1st Amoxycillin
2nd Erythromycin
3rd Vancomycin
4th Keflex

These medications are causing her to itch and they are now giving her an anti histamine (Piriton) to ease the itching.
I may add that she is also diabetic, and has several other complaints.

I know she has Clostridium Difficile, but she has had Irritable Bowel Syndrome since about 1978.
Can these medications be helping her problem?