71 years dad is sick from a bad cold and drowsy all the time. Is there a flu going around.

Folks, we are originally from Hyderabad, settled here from two years. Dad's having a rough time with cold, earlier it was a runny nose, we visited the Doctor - she gave Nexpro, Azee and Monral, 3 days ago - but doesn't seem to help at all. Do you guys have a better suggestion please? I'm thinking there is some local remedy that maybe better or suggestions on how to handle this better?