DayQuil Severe Cold and Flu Uses, Side Effects & Warnings
Nasal Decongestant Phenylephrine in Some Nyquil, Sudafed, Mucinex Doesn't Work - Bloomberg
Phenylephrine is useless. How many more drugs like it are out there? - Vox
Popular cold and flu medicines leave Columbia shelves | Carolina News and Reporter
Decongestant in Cold Medicines Found Ineffective, FDA says- Motherly
FDA finally admits that active ingredient in some DayQuil and Sudafed decongestants isn't effective. How many other commonly-used drugs don't work? - Genetic Literacy Project
The Decongestant in Sudafed PE and Dayquil Doesn't Work
Want cold medicine that actually works? Here's what doctors recommend
Vicks DayQuil FAQ – Vicks
Vicks Dayquil Liquid Severe Cold & Flu Relief Medicine 8 oz — Mountainside Medical Equipment
Sudafed PE Pressure Pain and Cough vs Vicks DayQuil Cold & Flu Relief LiquiCaps: What is the difference?