When I have colds my doctor always prescribe Sinupret, to be taken 3x a day. I also buy Ceecon (Vit. C) and I take 2 tables/day. I drink lots of water and juice (my favorite is Harvey's). I just need to make sure I have enough rest and as much as possible I don't drink/eat anything cold as it may cause the voice to be hoarse.
My cold will be gone in 4 days. Yehey!