It doesn't cause sleepiness. Other side effects include dizziness, headache, and upset stomach. Phenylephrine HCl is found in the following Nyquil products: Nyquil Severe Cough, Cold, and Flu Nighttime Relief (Liquids, LiquiCaps, and VapoCool Caplets)14-Dec-2020

Does NyQuil make you groggy the next morning?

However, while NyQuil may provide relief at night, many people have trouble shaking the grogginess when they wake up. This is a NyQuil hangover, and those suffering from it will often do whatever it takes to emerge from it and feel like themselves again.

Can NyQuil make you tired all day?

Q: Will NyQuil make me sleepy? A: Yes. NyQuil may cause marked drowsiness.

How long does NyQuil take to wear off?

Chlorpheniramine: Out of all the different NyQuil components, chlorpheniramine usually takes the longest to clear your body. It may take 120 hours (5 days) for just one dose to clear. Dextromethorphan: To get rid of one dose of dextromethorphan, your body will also need more time: about 55 hours (more than 2 days).

Does NyQuil make you dizzy the next day?

Drowsiness, dizziness, blurred vision, upset stomach, nausea, nervousness, constipation, or dry mouth/nose/throat may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Can you take NyQuil with Covid?

What about over-the-counter treatments like Nyquil, Theraflu, and Sudafed? You can use over-the-counter (OTC) medications to help relieve common symptoms of the flu or COVID-19. But these medications are not a treatment for the flu or COVID-19, meaning they do not work to kill the viruses that cause these infections.

Why is alcohol in NyQuil?

Hooch has been used as a folk remedy for the common cold for centuries (despite the fact that it doesn't work). But according to Procter & Gamble, alcohol's sole purpose in NyQuil is to serve as a solvent, keeping the top three ingredients in solution.

Can I take NyQuil if I have Covid?

What about over-the-counter treatments like Nyquil, Theraflu, and Sudafed? You can use over-the-counter (OTC) medications to help relieve common symptoms of the flu or COVID-19. But these medications are not a treatment for the flu or COVID-19, meaning they do not work to kill the viruses that cause these infections.