epilepsy
"As far as control, this drug has been a God send.  In way of weight gain, this drug has been a nightmare.  I have gained 90 lbs in the 10 years on this drug.  I have tried switching medicines, but have had two seizures doing so.  I am healthy other than the weight gain.  The drug has done what it is meant to do, stop seizures. I call it being Fat and Functional."