Carbamazepine
"I have been given tegretol to take for TN, then had decompression surgery. This relieved pain for 7yrs. A surgeon told me it need to saturate my system first and then begin script of 200mg x 3 per day. This means I needed to take 2 tablets together. This takes the pain away. I ensured I lay low for a few hours as this made me sleep. I am now on 400x3 times each day and all is good."