My mother is suffering severe trigeminal neuralgia problem from last 3.5 years and MVD and Gamma knife surgeries are done on Dec 20 and Jan 22 respectively. But still she is facing lot of pain in right side Jaw upto brain. She is having vestibular shwanoma too. Operating by gamma knife. Mazetol 1200mg total day and Gabantin 300mg took 2 times per day. She is eating liquid type food only and able to hardly walk. Cause of medicine see feel constipation and vertigo. Any permanent solution to stop pain. kindly advise.