I think the weight gain has a lot to do with it too! I was 6stone when starting pregabablin and now nearly 7. I have lots stones this year due to my anxiety and experienced a halt to gaining any weight I couldn't gain anything and just had no appetite. Since being on pregabablin it's been a blessing and I can't stop eating. For most people that would be very frustrating but in my case it's a miracle. But because I've gone from eating next to nothing to lots I think it does effect the body slightly x