To Dixichick yes, lower doses of Gabapentanoids are mostly more efficient for treatment at lower dosages, they have great potential but if a low dose does what it needs to do then keep it that way.
I know lyrica capsules are easy to open, but I'm not sure about gabapentin capsules, if you want to take half of that amount speak to your GP, I'm sure if you elaborate on your situation well they should understand.