If you started treatment with any congestion it's probably only been made worse by the ribavirin, which is known to cause increased phlegm and coughing
. Myself, I usually start the day harumphing like
an old man or, to stay gender-consistent, like
Marge Simpson's sister Selma. Your response to the interferon shot makes sense, too: the drug concentration reaches its peak in what, 72 hours? Somebody help me out here. I react on exactly the same timetable as you, if that's any consolation.