Hi folks, I have been on Gabapentin for some time now for sciatica. I have been taking the 300mg yellow capsules x 5 a day ( 1500mg daily ). They have helped with the sciatica and I have experienced all the usual side effects - brain fog, sleeping a lot, bit of weight gain etc. Two weeks ago, my GP decided to change my dose to 800mg twice a day ( 1600mg daily ) so I didn't have so many to take. This dose has been given to me as a big white tablet instead of capsules. Since I started taking them, they are still helping my sciatica but I am now full of energy, losing weight and not sleeping as well. My mind is now clear as a bell and I am buzzing! Has anyone else experienced anything like this? It is almost as if I'm taking a placebo but it's still helping my sciatica. Thanks all and keep smiling.