I did the throat coat when I had a 20 day cold and lost my voice for 18 of those days. I didn't do it until the last 4 days cause I forgot about it and wished that I had drank it sooner. Um I asked the gi the same ? cause I also wanted to take EmergenC for extra vitamins with that and he said as long as I didn't do it EVERYDAY for forever that the occasional taking of it (like when you get sick) would be fine.
Just like love pink says. All doctors have diff beliefs.