Treatment
An antibiotic, like penicillin, is usually administered to get rid of the leptospirosis infection. Doxycycline is given later in the treatment to rid the dog of any remaining bacteria that could make him a carrier. It is often necessary to treat the dog for dehydration, as well as vomiting or possible kidney or liver infections. Fluids are usually given intravenously to rehydrate the dog quickly. Dehydration that goes untreated for more than six hours can cause serious complications. Other medications may be prescribed to treat other symptoms.