I was at 200mg for a bit but that's when I didn't keep to a regular schedule and would take it 4 hours early or 5 hours late etc.
It was so serious that I was weaving in and out of lanes. I pulled over and slept for an hour and a half, got back on the freeway and weaved again. I'm a safe driver and NEVER even drink. Even when I'm manic, I'm an excellent driver - probably even better as I can calculate distances and speeds more quickly. (Of course this could all be BP grandiosity, not sure...

)
Anyhoo, I'm fine now at 300mg. No issues.
Honestly, neurontin is way worse for me in terms of dizziness; it's as if I'm drunk.