Gabapentin medication is an anticonvulsant medication that is used to treat anxiety and insomnia, but it can also cause hallucinations. When someone uses gabapentin medication for medical reasons, they eventually get addicted to that medication. After becoming addicted to gabapentin when they realize this is not good for their physical and mental health, they want to quit suddenly, but it’s because of some side effects. Among those side effects, hallucination is also included. To recover from this, you need to be treated in a gabapentin addiction treatment center.