I recently emailed Dr. Buchfuhrer and asked:
"Which is the best way to take gabapentin if one is taking 1500 mg at night?
1. 300 mg 6 hours before bedtime, 600 mg 4 hours before bedtime, then 600 mg 2 hours before bedtime or
2. Split the dose 1/3, 2/3 which would be 500 mg 4 hours before bedtime and then 1000 mg 2 hours before bedtime."
This is what he answered:
"The issue with gabapentin is that most people (like 75%) do not absorb doses of this drug in doses above 600-900 mg. When you take more (in a single dose), you absorb only a part of the extra (above 600-900 mg) so the extra does not add that much. As such, your first plan is better but you may not absorb a significant amount of your second and third doses as they will likely compete for absorption with the earlier doses."
I then sent another email to DrBuchfurer and asked him: "If one wanted to stick with gabapentin, would perhaps 600 mg 4 hours before bedtime, then 900 mg 2 hours before bedtime be better than my first plan below? " He answered: "Unlikely"