migraine
"My 11 year old was on Neurontin for 2 years for her migraines.  A few months ago the doctor needed to up her dosage to 600 mg/day because her weight had changed and she was getting more migraines.  She ended up with terrible side effects:  crying, anxious, paranoid, restless, overreacting, mood swings.  We have just weaned her off of it..not sure what we'll try next."