Getting drunk is not a Torah prohibition, per se. However, it certainly not recommended - the Talmud teaches that one who gets drunk loses control of their self-control and reveals their most inner-most persona. Aside from that dimension there is also the potential for alcohol dependency and the negative impact that that has on the person himself and all those around him. There is one possible exception to that and that is the idea of getting drunk on Purim but even then one should not drink to a state of complete drunkenness if they will become violent.
