Yes, antiseizure medications such as Trileptal can affect cognitive function, reflex time, etc. When side-effects grossly interfere with quality of life, you may want to discuss with your doctor trying something else, or adding a medication to help cognition in the daytime such as used for narcolepcy or even alzheimers.

However, your poor sleep qualty is of utmost importance to address. It can cause cognitive impairment, mutiple physical issues, heighten pain sensitivity, and even cause paranoia and precipitate depression and psychosis.