Vicks NyQuil is a brand of over-the-counter medication manufactured by Procter & Gamble intended for the relief of various symptoms of the common cold.
All medications within the NyQuil imprint contain sedating antihistamines, hypnotics, and/or alcohol; they are intended to be taken before sleep.
The recommended adult dose contains: The LiquiCap capsule version has the following active ingredients per pill, half the recommended adult dose: NyQuil D contains pseudoephedrine, a decongestant that in some regions (such as the United States) is now placed behind the counters at pharmacy and other retail stores and must be requested by the customer.
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.
[citation needed] Vicks chose to reformulate NyQuil Sinus in 2006, replacing pseudoephedrine with phenylephrine.