I bought a box of 10 of these items from my local Tesco Express - as a busy commuter I was quite impressed by the claim that it "gets to work in five minutes" as it normally takes me 35 to 40 minutes, and even then I can't always find a parking space.
The powder in these sachets did make me feel markedly better and ease my sniffles but it made no difference in my journey times. If anything it now takes even longer.
Perhaps it is intended for those who live closer to their place of employment, but the instructions made no mention of this.