I think it does enter the lungs immediately,
ALL OF THE SPRAYS DO, THEY EVEN FILL THE ROOM. I HAVE SEEN A ELDERLY PERSON SNEEZE 1 MINUTE LATER THAT WAS SITTING 20 FEET AWAY AND THE 1 SPRAY WAS SO LITTLE YOU WOULD NOT THINK SHE COULD HAVE SMELLED IT.
I have been squirting it on my chest for some reason, and instantaneously I get a hacking cough for a moment. I suppose it is expelling something?
ABOUT 50% COUGH AND ABOUT 50% HAVE NO PROBLEM...MANY OF THOSE THAT HAVE COUGHED AND CONTINUED HAVE WRITTEN BACK AND PROCLAIMED THE SPRAYS THE GREATEST DECONGESTANT THEY EVER USED.