"i&#039;ve been on gabapentin for several yrs &amp; it was originally for back pain. i had my l4/5 disc fused then 6 years later had a spinal cord stimulator put in. 4 surgeries later no relief at all. i&#039;ve been on 300 mg 3x&#039;s a day. but recently my neurologyst decided that i should actually take 600 mg 3x&#039;s a day because i&#039;ve been suffering from migraines since age 7. the thing that i&#039;ve noticed is that my memory is off. i will be in a drive thru &amp; have a list of items that i want off the menu &amp; as soon as they ask me what i want, i draw a blank &amp; look at my son like &quot;help&quot; at first i didn&#039;t think anything of it but now it&#039;s becoming habit. why??"