"i am taking this medicine for severe anxiety and worry. i&#039;ve tried many other medicines with little benefit and my doctor said that gabapentin works well in patients where the traditional ssri&#039;s don&#039;t work. she was right. within three days i found significant relief from my symptoms. the only downside is insomnia. not sure this is even a common side effect but i haven&#039;t slept in like five days. hoping i don&#039;t have to get off of the medicine because it is really helping me, but man am i tired."