Is neurontin (gabapentin) treating shingles pain dangerous to the kidneys for 55 yr. old man w/chronic renal insufficiency secondary to chemo 14 yrs. ago for aml?

Reduce from normal: There is a recommended dose reduction for Gabapentin in cases of renal insufficiency no matter what the cause. You should check with your physician on this question. He will likely look up your kidney parameters and match that up against the dose changes that are accepted in such cases. Good luck.

Potentially yes: Because blood levels can climb quickly as creatinine clearance decreases. This must be taken into account by the prescribing physician so as to avoid toxic build-up of the medication in your body. Best wishes.