what did they take out of Nyquil to no longer cause drowsiness?!

http://en.wikipedia.org/wiki/Nyquil#Refo…

"Previously, NyQuil Cold/Flu Multisymptom Relief and NyQuil Sinus contained pseudoephedrine (30 mg/15 mL), another nasal decongestant that also formed the active ingredient in Sudafed. Following the passage of the Combat Methamphetamine Epidemic Act in 2006, in the United States all pseudoephedrine-containing medications must be kept behind a pharmacy counter and all purchases must be logged.
Vicks chose to keep its products more easily accessible by reformulating NyQuil Sinus, replacing pseudoephedrine with phenylephrine. Many people were outraged by this change and chose to boycott the product, because studies have shown that phenylephrine is no more effective than a placebo. Due to the protest, Vicks chose to revert to the original formula which became NyQuil D.[1]
NyQuil no longer contains phenylephrine except for the sinus LiquiCaps variety.[2]"

So they did it because too many people were abusing it and making Meth.


With that being said, medicines will have a stronger impact on children and smaller adults than they do on fully grown adults and larger people. Even if you took the same formula that you took as a child, you wouldn't have as much of an impact now because you're older and bigger than you were then. I'm willing to bet it's a combination of the formulation change and your size as you got older. I hope this helps!

Health/nutrition classes, personal research, and Wiki

the good stuff.. lol