Best way to take partial capsule?
I've been on nine 300mg capsules of gabapentin a day (taken as three capsules, three times per day) for nerve pain from a leaky spinal disc since 2014. I'd really like to try to taper down and see if I can make do with less, but I found that when I tried to do that by just skipping one of the capsules in the mid-day dose (which I figured would be least disruptive time), I got very unpleasant withdrawal symptoms. So, I'd like to try dumping out maybe half, or maybe even just a third, of the powder from one capsule each day and see if tapering off by much less like that might be better.
I tried opening one capsule (which was difficult) and dumping some powder out, but then I could not put the capsule back together again (it wouldn't fit back together again and, besides, the capsule had chipped on the rim). Would buying empty capsules and filling them with some of the powder be easier? If so, what size capsule should I get? And is there an easy way to measure out a half or two thirds of the powder to put in the new capsule without just eyeballing it?
Thanks, in advance, for any help!