"Fishermans Friends" (no smutty comments please) are a rather strong/hot throat lozenge produced just down the road from me by "Lofthouses" of "Fleetwood, Lancashire, England". I heard rumours a couple of years ago that they were exporting to the USA abnd Japan!

On the singing front, some years ago I went to night school voice training lessons. Best thing ever. It's amazing how improvements in technique also improve your ability to cope with lifes little difficulties. The warming up / stretching / relaxing exercises involved also help a lot.

Also,

"Stay away from the "Cloraceptic" type sprays that numb your throat"

ABSOLUTELY

Pain is natures way of telling you to back off!