tea honey &lemon always made my throat feel better. &gargle mouth wash 2make the sore throat go away faster.
Emergen-c drink works great
I don't honestly know if you can take theraflu. I would call your doctor for an answer to that one. Green tea with lots of honey might do the trick though. It's warm, the honey will coat your throat which should relieve pain and irritation, and since it's green tea you can drink as much as you want! Hope this helps a little