Do not stop taking NEURONTIN without first talking to your healthcare provider. Stopping NEURONTIN suddenly can cause serious problems. NEURONTIN can cause serious side effects including: 1. Suicidal Thoughts. Like other antiepileptic drugs, NEURONTIN may cause suicidal thoughts or actions in a very small number of people, about 1 in 500. Call a healthcare provider… Continue reading What is the most important information I should know about Gabapentin?