Thanks for choosing health care magic for posting your query.
As you have asked for a direct comment, my answer will be direct. Gabapentin
2400 mg is a very high dosage for this kind of illness. Moreover if there was no abnormal behaviour there was no need to increase in dosage. Further such illnesses are better treated with behavioural therapy and cognitive therapy
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
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Wish you good health,
Dr. Srikanth Reddy M.D.