ZzzQuil Reviews – Will It Really Help With Insomnia?

ZzzQuil liquid contains Diphenhydramine HCl is very effective in deactivating alertness and putting the mind and body at ease and at rest, promoting sleepiness.

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In This Review

What is ZzzQuil?

There are so many types and brands of sleeping aid products in the market today manufactured to provide a solution for people who have difficulty falling asleep and for those who are suffering from insomnia.

A lot of medical studies have already pointed out that certain factors affect the quality of sleep. This will include, fatigue, emotional and mental stress, age, anxiety among other things. Many top sleep aid supplements have their unique formulation from natural components to herbal infused products.

But there is one product in the market that aims to deliver an effective remedy for occasional sleeplessness while reducing the amount of time to fall asleep and this is ZzzQuil Nighttime Sleep Aid by Vicks Nyquil.

How Does It Rate?

Overall Rating: 3.7

Value for Cost

3.7/5Value for Cost
Return Policy

3.6/5Return Policy


Brand Highlights

  • ZzzQuil Nighttime Sleep Aid comes from the manufacturing company Vicks Nyquil and has been out on the market for several years now.
  • It comes in two forms liquid and LiquiCaps.
  • This sleep aid comes in a formulation that is non-habit forming that promises to provide relief for occasional inability to sleep.


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*All individuals are unique. Your results can and will vary.

Key Ingredients

  • Diphenhydramine HCI


  • ZzzQuil is an over the counter sleep aid remedy that can be purchased easily at store or through various online web stores
  • It may help to treat occasional sleeplessness by inducing drowsiness and blocking alertness
  • It comes in two options-capsule form and liquid to cater to the user preference
  • Quickly absorb in the body


  • Does not address the root causes of the inability to fall asleep or disturbances during sleep
  • The main ingredient Diphenhydramine HCl functions to provide sleepiness by inducing drowsiness. It aims to block mental alertness and can be potentially dangerous
  • It contains alcohol about 10% that is not good for those shying away from this substance

How Does ZzzQuil Work?

The active ingredient in both ZzzQuil liquid capsule and liquid is Diphenhydramine HCl 25 mg which is very effective in deactivating alertness that can put the mind and body at ease and at rest promoting sleepiness.

Our body naturally produces histamine that is a substance that transmits a message directly to the brain telling the body to remain awake and alert.

The main function of Diphenhydramine HCl is to act as an antihistamine, blocking and switching off mental alertness making one feel relax and drowsy in the process.

According to the National Center for Biotechnology Information, Diphenhydramine hydrochloride can provide a remedy for occasional sleeplessness which in turn can cut the time it takes for an individual to feel sleepy.

ZzzQuil Sleep-Aid Ingredients – Are they Safe & Effective?

Diphenhydramine HCI

This Vicks formulated sleep aid has one major component that is diphenhydramine HCI a compound that helps one fall asleep as per https://clinicaltrials.gov/ [1].

Other inactive ingredients such as colorant and flavorings are added. Alcohol is present in the ZzzQuil Liquid drink form.



*All individuals are unique. Your results can and will vary.

Zzzquil Sleep Aid FAQ’s

Q: Who Can take ZzzQuil?

A: ZzzQuil Nighttime Sleep Aid is intended to use by people who have trouble getting good sleep occasionally.

Q: How to take ZzzQuil Sleep Aid?

A: As the manufacturer suggests, ZzzQuil Liquid can be taken as a single dose or serving using the supplied cup or a tablespoon once a day.

It is advised to take one dose over every 24 hours.

Q: What are the side effects of ZzzQuil Sleep Aid?

A: Dizziness, upset stomach, dried eyes, mouth, nose, and blurred vision.

Q: What is the price of ZzzQuil Sleep Aid?

A: $5.49 – $13.99 depending on the store you buy ZZZQuil at.

Q: Where can I buy ZzzQuil Sleep Aid?

A: Most drug stores, Walmart and Amazon.

Q: Can I return ZzzQuil Sleep Aid?

A: Returns would be based on the store where you bought ZzzQuil Sleep Aid.

Q: Does ZzzQuil Sleep Aid work?

A: 4.1 out of 5 stars on Amazon, the user felt as they got a good night sleep and woke up refreshed.

Q: What are the potential dangers of overdosing?

A: It is advised to take one dose over every 24 hours. In a case of fear of overdose seek medical attention right away


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*All individuals are unique. Your results can and will vary.

ZzzQuil Sleep Aid Review – Final Verdict

The use of any top sleep aids should be carefully considered first by any individual searching to treat their sleeping problem.

The ZzzQuil main function of inducing sleepiness is by promoting drowsiness which can be potentially dangerous.

This is how this product works and will not address the important issue of inability to fall asleep and other sleep concerns.

The lack of information with regards to specific side effects and other warnings lack supporting details that would benefit users.

Overall this product is good if you want to feel groggy just to fall asleep but, if you need to treat the root causes of your sleeplessness then this product will certainly disappoint you.

The one-approach system of ZzzQuil is questionable in providing adequate relief to sleep problems.

And it is not smart to experiment with this type of sleep aid due to its major component that may cause serious implications.

Price wise this is not a practical buy but instead, look for sleep aid products such as Sleepasil, Neuro SLEEP and Dream Water Sleep Aid that will have a holistic approach to treating your sleep-related issues.

‘ZzzQuil Sleep Aid’ can be purchased through their Official Website.

There are many people who may have a hard time falling or staying asleep. Consequently, they wake up exhausted and irritable. Effective, natural sleep aids can help return to a normal sleep schedule resulting in improve overall health, mood, and well-being.

Below you'll find some of the most effective all natural sleep aid formulations on the market today, in our opinion.

Our Top Sleep Aid Choices

Verdict on Claimed Benefits: Below is our summary of the available evidence for the claimed benefits of below mentioned natural sleep aids, sleep support supplements and anti-snoring mouthpiece based on the available research:

VitaPost Sleep Support Plus | Best Sleep Support Supplement
Supports Healthy Sleep Cycles*Gold Star Evidence
Occasional Sleeplessness Relief*Gold Star Evidence
Enhances Sleep Quality*Strong Evidence
Supports Relaxation Feelings*Gold Star Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.9
Pitch Black | Advanced Deep Sleep Formula
Improves Sleep Quality*Gold Star Evidence
Increases Energy Levels*Strong Evidence
Boosts Testosterone and Libido*Gold Star Evidence
Supports Muscle Recovery*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8
NooCube Sleep Upgrade | Boost Cognitive Performance
Fall Asleep Fast*Gold Star Evidence
Stay Asleep Longer*Gold Star Evidence
Improves Brain Performance and Memory*Strong Evidence
Improves Mental Health*Strong Evidence
Rating Breakdown
Support for Claims:
Ingredient Safety:
Value for the Price:
Brand Transparency:
Overall Rating: 4.8

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

Customer Reviews for ZzzQuil

ZzzQuil Reviews – Will It Really Help With Insomnia?

Customer Reviews & Ratings

2.3 out of 5

Review this Product

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  1. Brenda K

    Sound sleep with drowsiness during the day
    I’m the manager in my father’s company, and too much is required of me. There are many operations and activities that I run, making me overthink and always stressed. I find myself in the middle of the night, staring at the ceiling sleepless. I had to look for a quick remedy because my eyes were always heavy, and I ‘couldn’t perform my tasks effectively. I needed a sleeping aid supplement to curb my insomnia. I found ZzzQuil from its official website with the hope that it would ease and make my body and mind to relax appropriately. ZzzQuil is what I was looking for all along. On using the supplement, I would find myself sleeping soundly, relaxed, and waking up in the morning fresh. While at work, I would experience some drowsiness, and this would block my alertness at work. I had to reduce my dosage from two to one tablespoon to avoid the drowsiness.
  2. Jared O’Brien

    Works for me
    Been having trouble sleeping since having had blood clots. Zzzquil gets me to sleep. It works well for me.
  3. Deborah F

    A little on the weaker side
    know that Zzzquil is not a strong prescription sleep medication, but sometimes when I take it almost feels like nothing happened. I have a very hectic job and many days I am lucky to get five hours of sleep. On the weekends I occasionally would take one of these to sleep in a bit longer, but much to my surprise many of these days doesn’t even help me get to sleep. I would lay in bed two hours or longer trying to get to sleep, which I know for a fact is more than enough time for the sleep aid to start working. I guess you have no alternative right now but to continue using it.
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Procter & Gamble
12 fl oz
Diphenhydramine HCI

1 Sources

We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

[1] Diphenhydramine HCI https://clinicaltrials.gov/ct2/show/NCT02578186

**This is a subjective assessment based on the strength of the available informations and our estimation of efficacy.

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