Been on topirimate for over a year. have crps with no allergies. is it worth trying name brand topamax (topiramate) to see if it is meds causing itch?

Unlikely benefit: Would be rather unique to develop allergic rxtn to topirimate after a year, and more likely, your itch is due to something else. The brand would be chemically identical, and not give an answer. Might be best to see a dermatologist to uncover why your skin is irritated.

No: Changing from a generic to a brand name will not make a difference.