Means of VAS scores for carbamazepine , pregabalin , and venlafaxine treatment groups at the baseline ( 74.5 , 82.3 , and 74.5 ) and endpoint ( 39.6 , 33.4 , and 46.6 ) revealed significant reduction , although pregabalin was more efficacious than carbamazepine , and venlafaxine .