"i have been diagnosed with gad, panic disorder and ptsd. i was having a hard time managing my anxiety with my zoloft and xanax only combo so my pdoc prescribed 300 mg gabapentin 1/day. i did not feel much relief from this dose and it was upped to 300 mg 3/day. it&#039;s been 4 months and i have since had to increase to 600 mg 3/day and it&#039;s  been really working for me. i do not have many side effects. i can tell if i miss a dose as withdrawal symptoms come rather quickly. i have not gained or lost weight. i am not overly tired and it does not make me feel restless. overall, this med is working for me and i am glad my pdoc suggested i try it."