Neurontin and its cousin Lyrica are excreted thru the kidneys unchanged.
In an 85 yr old person, I'd expect some kidney slow down or slower rate of clearance...and this will affect dosing. Smaller doses should be considered for anyone with kidney impairments. So suggestions for a typically normal person, may not apply at all to your Mother.
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Weezie looking at petunias 8.25.2017
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