Pain
"If the purpose the taking gabapentin is to hurl you into a state of psychosis then it gets a ten because this is a very real side effect of this drug. The Pfizer company does not want you to know that it can and has caused many people to go into a psychotic state. Not for a day mind you  but for as yet an indeterminate amount of time.They put on the warning do not abruptly stop this medication, but they don&#039;t tell you why. "