respiratory infection

I have a yellow belly slider that recently came down with a respiratory infection. I took him to a vet and received an antibiotic suspension.Does anyone know of an easier treatment to do this?
Any advice would be greatly appreciated.
Thanks

Flu viruses spread in respiratory droplets caused by coughing and sneezing. They usually spread from person to person, though sometimes people become infected by touching something with flu viruses on it and then touching their mouth or nose. There are certain types of flu whuch can be caused by birds and this is know as bird flu..
To know more about tamiflu see http://www.drugdelivery.ca/s33713-s-relenza.aspx
This contains a lot of information on Relenza.