There's a couple of natural ways that could help your sore throat. Honey and Lemon are traditional. Echinacea helps the immune system, too, but be careful with it because if you use it for too long your body becomes immune to its effects.
Then there's this fizzy tablet stuff that I love with B12 complex vitamins with Vitamin C. Tastes foul, but DANG does it ever knock out a cold!
The simplest method would be to charge your items for your sore throat then eat or drink whatever you're going to use after you've charged it. Raise energy (dancing, shaking a rattle, even shaking the item for about 30 seconds, as long as it won't make a mess) and direct the energy towards the items you want charged. Remember to program the item with healing!