Are there any alternative treatments for rabies?

No. Since there's very little standard treatment for rabies once the disease has begun, it's hard to talk about "alternative treatments." someone with rabies should be hospitalized. There have been a few cases of survival with an induced coma. The most important way to deal with rabies is to give human rabies immunoglobulin (hrig) and Rabies Vaccine after exposure, before the onset of disease.