I'm curious what your sinus remedy is exactly ... I stay away from meds as much as possible, and your post caught my eye.
Starwise put me onto this and she has more info than I.
It's for knocking out sinus infections, although I suppose it would help sinus headaches too.
The recommended procedure is to get a high-power motor juicer and pulverize the snickers out of horseradish root, then mix the pulverized root with lemon juice (I juiced the lemon, peel, seeds, everything) and take 1 t. three times a day.
I burned out the motor on my juicer (horseradish root is very tough), so Star suggested I mix horseradish from a jar, with lemon juice. It's working better than when I used to pulverize it. I should be taking it three times a day.