Both Prozac and Neurontin cause insomnia rather than increased sleepiness. It can be due to not getting enough sleep, drug, alcohol, or cigarette use, lack of physical activity, obesity, the use of certain medication, depression, restless legs syndrome, sleep apnea, or narcolepsy.
You need to get it evaluated from a sleep specialist.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
He said he had been diagnosed.... not sure you really read or comprehended his question!
You've responded to a "dead" post from two years ago. I encourage you to click the green "Post a Question" button on the top of the page if you have any questions about sleep disorders. Thank you for your time.