Talking about remedies for sour throat, the best so far (and I really have a long experience with this kind of problems) is Bioparox (Locabiosol) spray, main ingredient being Fusafungine. If your nose is also affected, then Tantum Verde is the answer, although you need a prescription to get some here. Halls is another good remedy, don't know if you can get any here, in my country you can find it at the supermarkets.
For cough the best remedy is Stodal (syrup).
Anywho, I tried to find some Halls or vics around here but managed to find Strepsils w/ Honig & Zitrone at an Apotheke. They seem to be working. Only downsides are that they leave the roof of your mouth numb and cost about 50 rappen/tabletten.
I remember there was some aweful, aweful tea you could boil and then gargle. It smelt/tasted horrid but the next morning you were good to go. Don't remember the name anymore.