There are cases where an overdose of Gabapentin has proved to be fatal. Just just in case there's an overdose of the drugs then the patient must tend emergency medical treatment. Refrain from substance abuse . If you're feeling that the prescribed dose of Gabapentin isn't giving the required effect then don't make any changes to the dosage on your own. Ask the doctor for the same . you would like to prevent the Gabapentin only after checking with the doctor.