I am on my 9th day of shooting sharp pain every few seconds so I went to my doctor.. and he prescribed Tegretol. I am going crazy with pain.. I have taken 2 200mgs of Tegretol today... I just want to know how long it will take to relieve some of this pain... I have epilepsy..and take phenabarbitol daily(60 mgs quid) to control seizures since I was 11..I am now 56. The epilepsy was caused by an accident and most probably so was the neuragia..I have taken Tegretol for seizure control but never for a bout of neuralgia... how long before I find relief???