Looks like it could be Trichocerus Bridgesii. I don't know if there are any non-psychoactive look-a-likes though. Compared to other psychoactive columnar cacti, the spines seem too spikey to be San Pedro and the ridges don't seem deep enough to be Peruvian Torch.
Thanks guerillabedlam, is there any chance that it could be Trichocereus Macrogonus? I'm hoping not. It seems really hard to identify within the Trich species... I am not sure that it's not Peruvianus or even Trichocereus cuzcoensis. I most suspect that it is, as you say, bridgesii.
