Gabapentin for migraines

Hey everyone,
So, my friend has been dealing with these brutal migraines for like forever, and they’re getting even worse lately. She’s tried everything, but nothing seems to kick these headaches to the curb. Her doc just put her on gabapentin, but she’s freaking out about the long-term side effects, like memory loss and all that jazz.
Has anyone here tried gabapentin for migraines? Got any tips or insights? She could really use some advice. Thanks a lot!