How Safe Is Trigabantin Withdrawal In A Diabetic?

I am a diabetic patient for over 35 years and i was recommended trigabantin300 for some other ailment like vertigo by a neurosurgeon for a better bloodflow. I had been using this for an year or so even though the doctor advised me only for a shorter period. Now I have stopped it for over a month. Will it cause any complication or can I use it for better bloodflow even without doctors advise. T/G/SUBRAMANIAN