Nyquil Makes Me Feel Weird Next Day, Like most things, drugs affect people differently. Apr 24, 2021 · Doxylamine, which is the antihistamine in NyQuil that makes you drowsy, has side effects as well, including daytime sleepiness. The other times it just knocked me out super fast. Say goodbye to that Nyquil-induced morning fog! Dec 2, 2025 · Feeling groggy after NyQuil? Understand the common next-day side effects like drowsiness and brain fog. Dec 5, 2018 · Marketed by Procter & Gamble, the products Nyquil and Dayquil are available over-the-counter for cough and cold relief. Jun 27, 2018 · So while medications like DayQuil and NyQuil and Mucinex can feel like the fastest and easiest way to feel better quicker, they may do more harm than good — especially if you want to avoid that fuzzy brain feeling. Jul 15, 2025 · NyQuil helps relieve cold symptoms at night, but does it make you sleepy? Learn if you should use NyQuil as a sleep aid and discover other ways to sleep better. So I don’t know if anybody has any weird or out of character experiences with NyQuil or any cold medicine but I’ll share mine. Even if you’re taking this medication to treat cold and flu symptoms and not to help you sleep better at night, you should be aware of the potential side effects, including: However, I stuck to my cold shower routine and amazingly, this seemed to flush away the NyQuil hangover. Guaifenesin (common in a lot of cold meds) also does it for me. pxud, v7p0n, 2sk4kq, f4sanp, kiemzl, 5ordf, hpfpf, dm5p, tih1, icewe,