Drink only bottled drinks. Nothing, however, can beat the immunisation one acquires by getting vaccinated. The vast majority of people will have been vaccinated during childhood but it does no harm to get a booster before going to a country where the disease is still common. There are two vaccines available. It's advised as a booster for people who have already been vaccinated some time.
Vaccination normally gives a life-long protection.
There's is no known medication directed against the virus itself, so treatment will be aimed at suppressing the symptoms. Artificial feeding and respiration may be necessary. Once paralysis has set in it will be important to concentrate on physiotherapy to retain the function of the limbs as much as possible. Next Rabies is a disease attacking the central nervous system and is always fatal after the symptoms have shown. Therefore it should at least make travellers a bit worried.