Any healthcare providers online?

Last night I went to the Er and was tested for flu/N1H1 and were negative. I had chest x rays and was determined I have pneumonia. My sugar was 732 bec of the infection. I was given 4 bags of saline solution, 80 units of insulin, 2 shots of morphine, 1 shot of ativan and a 750mg of levequel antibiotic and one Tami Flu. I was sent home after 8 hours and after getting my sugar down (they earlier said they were going to keep me) and the prescriptions they gave were Lortab, Talu, Ativan and Phenergran. If my flu test was negative, why did they send me with a script for Tau?