I am looking for information regarding side effects for Vimpat and other anti-seizure medications. My husband has a Glioblastoma Brain Tumor and has had 2 brain surgeries. I am having trouble finding much from users of Vimpat for brain tumor patients so I thought I would try here. He has been on Vimpat for 2 years. The first year or so he was on 100mg twice a day but is now up to 200mg twice a day. He is having symptoms such as confusion, fatigue, and trouble concentrating. He did not have these symptoms until after his second surgery and after he went up to the 200mg of Vimpat. I am trying to find out if these symptoms are coming from the brain tumor, chemo or other medications that he is taking. I have read and heard that anit-seizure meds can have these side effects and that they can come later on after taking them for quite some time. Has anyone experience this with Vimpat or any other anti-seizure medications? Any insight would be really helpful. We are going through so much and need to find some answers. Thank you so much!