ZzzQuil Review – Does It Really Work and Safe To Use?

4.3/ 5.0

ZzzQuil Warming Berry is a product designed to tackle sleeplessness, a common problem in our increasingly stress-filled world.


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Overview Of Zzzquil

With sleeplessness and insomnia on the rise, the market is filled with sleep aids competing to cater to this problem. ZzzQuil is one such brand. But with so many OTC medications for this condition, what makes ZzzQuil different?

In this article, we will review the product, the ingredients, its claims for sleeplessness, how it works, and the pricing, among other details, to help you arrive at a purchase decision if you’re in search of a product for insomnia and sleeplessness. And if you have had any experience with ZzzQuil, let us know how it worked for you in the comment section below.

How Does Zzzquil Work?

Zzzquil’s Warming Berry’s active ingredient is Diphenhydramine, an antihistamine commonly used in the treatment of allergies like hives and itchiness. However, like most antihistamines, Diphenhydramine is not without its side effects, and top among the list is drowsiness.

Diphenhydramine binds to the body’s histamine-1 receptor, reducing the effects of histamines and, consequently, the time it takes to fall asleep (the body naturally produces histamines during an allergic reaction).

Like other diphenhydramine-containing medications, ZzzQuil is intended to be a short-term solution for sleeplessness.

Who Is The Manufacturer Of Zzzquil?

ZzzQuil is manufactured by Vicks, a subsidiary of the popular conglomerate Proctor and Gamble. The brand is a known maker of many over-the-counter medications for sleeplessness and other supplements. As an OTC, you do not require a prescription to buy ZzzQuil.


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What Are The Ingredients In Zzzquil?

These are the active ingredients in Zzzquil:

Diphenhydramine – Each soft gel capsule contains 200mg of This is the active ingredient in ZzzQuil’s warming berry liquid. It is contained in many allergy medications and is used to reduce allergy symptoms[1] such as cold, rash, itching, runny nose, watery eyes, sneezing, and coughing.

It may also be used to prevent nausea and vomiting that could result from motion sickness. As mentioned earlier, it works by binding with the body’s histamine receptor to reduce allergic reactions, and one of its side effects is drowsiness[2] , a reaction heavily capitalized on by manufacturers of sleeping medications.

Alcohol (10%) – Another ingredient in the ZzzQuil Warming Berry liquid, it is used as a solvent in the formula. Not only does alcohol help to keep the liquid consistent and smooth, but it may also help it last longer after opening.

The formulation is also available in an alcohol-free formula for adolescents or buyers who prefer the alcohol-free variation. Other ingredients in this formula include glycerin, gelatin, pharmaceutical ink, purified water, and sorbitol sorbitan solution.

The Science Behind ZZzquil

Histamine affects the wake/sleep pattern of any individual. ZZzquil primarily aids you in reducing insomnia by managing the amount of histamine produced by the body during an allergic reaction. By blocking its release, you may be able to enjoy a good nighttime sleep. ZZzquil’s primary ingredient is Diphenhydramine [3], an antihistamine that relieves you from the effect of symptoms such as itching, rashes, and sneezing.

What Are The Benefits Of ZzzQuil?

  • ZzzQuil may be as effective as claimed for sleeplessness
  • It does not require a prescription for purchase.
  • ZzzQuil comes in alcohol-free variation.
  • It does not require long term use for effectiveness.
  • It is non-habit forming (claimed by the brand).

What Are The Drawbacks Of ZzzQuil?

  • It contains alcohol, which may not be suitable for adolescents. There is, however, an alcohol-free formula.
  • It may cause some undesirable side effects in some users (to be discussed below).

FAQs: Consumer Questions & Answers

In our research for this report, we found that consumers are frequently asking the following questions online in regard to ZzzQuil.

ZzzQuil is designed to be a short-term solution for sleep problems. It is not intended for prolonged use. If you suspect that your sleeplessness may be a result of an underlying condition, you should consult your health professional for proper diagnosis.

Only one dosage is required and should be taken before bedtime.

There is no mention of a free trial anywhere on the brand's official website. There is also no mention of a return policy but considering that the product is sold in several places online, buyers would need to check the particular purchase website for a specific refund policy and free trial.

ZzzQuil isn't very different from many other sleep products. Many sleep products contain the same active ingredient, Diphenhydramine, and rely on the "side effect" of this ingredient; drowsiness.

The product is also within the price range of many over-the-counter medications. And even though the brand claims to use "special" Diphenhydramine, it is still the same compound present as the active ingredients in many other sleep medications.

Like many other sleep aids and allergy medications with diphenhydramine HCL as a key ingredient, ZzzQuil Warming Berry is not without its side effects. Some of the common side effects include:

  • Headache
  • Dry mouth
  • Poor or loss of coordination
  • Dizziness (again, it relies on this side effect to be an effective sleep medication)
  • Thickened lung mucus
The medication's primary ingredient may also interact with others. Therefore, it may be best to consult with your health practitioner before use if you are on any other medication.

It seems so. ZzzQuil, while an over-the-counter medication like most in its price and quality range, has been favorably reviewed in multiple places online. Sure, there are more expensive products that do not solely rely on a side effect of the main ingredient, but for a product in its quality range, it seems to work just fine if we're going by the reviews left on independent sites.

So, yes, ZzzQuil may be worth it if you are in search of an affordable sleep product with a proven ingredient, non-severe or minimal side effects, and mostly positive ZzzQuil reviews.

What Are Consumers Saying About Zzzquil?

ZzzQuil reviews have been mostly positive, with many saying it helped their sleep problem and a few saying it did little or nothing for them. A number complained of hangover effects, headache, and some other minor effects from use. There have been no complaints of severe side effects.

On pricing, many reviewers seemed OK with it.

Many people have a hard time falling or staying asleep, waking up exhausted and irritable. Effective natural sleep aids can help you return to a normal sleep schedule resulting in an improvement in your 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.

Rating Table Rating Table

Our Top Products

Try it now
Somulin Rating
#1 Somulin
  • Falls Asleep Faster
  • Improves Sleep Pattern
  • Feels Relaxed & Tranquil
  • Promotes Deep Sleep
  • Overall User Experience


  • Reduces the time it takes to fall asleep
  • Promotes deep sleep with no disturbances
  • Eases stress and encourages full relaxation
  • Has a 99% customer satisfaction rate
  • Causes no morning grogginess
  • Encourages healthy sleep patterns
  • Contains natural, scientifically tested ingredients
  • Creates a better feeling of well-being
  • Produces no harmful side effects
  • Will not cause addiction or dependency
  • Backed by clinical studies
  • Company offers a 60-day money-back guarantee
  • Online ordering process is safe and secure
  • Easily accessible and knowledgeable customer service department
  • Customers do not have to enroll in a subscription or auto-delivery plan


  • Only available from the official website
  • High demand results in low stock at times

The Bottom Line

Having problems falling asleep, or staying asleep throughout the night, is not only distressing but can impact many aspects of our health. Finding a powerful, yet safe solution is essential, and after looking at numerous supplements on the market, in our opinion, there is no better brand than Somulin.

With a clinically proven, all-natural formula, Somulin offers multiple benefits, helping to ease tension, promote complete relaxation, reduce the time it takes to fall asleep, and ensure the individual enjoys deep sleep throughout the night. Unlike some sleep supplements, Somulin produces powerful results without ever causing a dependency or next-day grogginess - on the contrary, Somulin customers report waking up feeling alert, well-rested, and fully refreshed.

When we took a closer look at the key ingredients contained in the doctor-developed Somulin formula, we had a better understanding as to why this brand works so much more effectively than its competitors. Not only is each ingredient included in its optimal concentrated amount, enhancing the overall potency of the formula, but they are all backed by scientific research and extensive clinical studies. For example, a study looking at the effects of Valerian Root and Lemon Balm, both found in the Somulin formula, showed that this combination reduced insomnia for 81% of trial participants and that in addition to having natural sedative properties, another key ingredient, German Chamomile, has proved to be highly effective in decreasing body movements at night, allowing the individual to fall asleep more easily. Additionally, research has shown that taking as little as 220mg of this botanical extract for 8 weeks can significantly reduce feelings of anxiety.


While Somulin customers love the fact that this maximum strength supplement starts producing powerful results in a very short amount of time, we were also impressed that it provided long-term benefits for the user too, thanks to the inclusion of Melatonin. This natural sleep hormone helps regulate the sleep/ wake cycle, establishing healthy patterns that contribute to improved physical and emotional well-being.

Because Somulin is made in an FDA-inspected, state-of-the-art facility by the reputable, established manufacturer, Pharmaxa Labs, safety and consistency are ensured with every bottle. Every purchase is covered by a 60-day money-back guarantee, which not only gives the consumer peace of mind but demonstrates the confidence the company has in its product.

We do not doubt that you will experience deep, restful sleep with Somulin, which will not only eliminate the distress caused by night after night of insomnia but lead to a better overall quality of life.

Zleep Patches
#2 Zleep Patches
  • Falls Asleep Faster
  • Improves Sleep Pattern
  • Feels Relaxed & Tranquil
  • Promotes Deep Sleep
  • Overall User Experience


  • Discounts are offered on larger orders
  • There is a money-back guarantee
  • It contains several clinically tested ingredients


  • Independent reviews have been mixed
  • Free samples are not available
  • It may not be suitable for all individuals
  • There is limited manufacturer information

The Bottom Line

As the name suggests, Zleep Patches are designed to be worn on the body overnight, delivering ingredients transdermally for up to 9 hours. While this type of product would be suitable for individuals who don’t like swallowing oral capsules, having to apply a patch may not be as convenient and there is limited information regarding their efficacy. Additionally, although this is an all-natural product, it doesn’t mean that it won’t cause side effects and there are reports of some customers experiencing an increased heart rate when using them. As with any health product, consulting with a physician is always recommended before use.

Primal Sleep
#3 Primal Sleep
  • Falls Asleep Faster
  • Improves Sleep Pattern
  • Feels Relaxed & Tranquil
  • Promotes Deep Sleep
  • Overall User Experience


  • It offers several health benefits
  • There is a money-back guarantee
  • Key active ingredients are listed


  • There is no clinical testing data shown for the product
  • Free trials aren’t available
  • It may cause gastric discomfort for some users
  • It has received some negative reviews

The Bottom Line

Primal Sleep appears to be a reasonably good quality sleep aid, although the formula contains a very standard blend of ingredients and there is no indication that it works any more effectively than other brands on the market. Furthermore, while most of the individual ingredients have proven benefits, there is no evidence to show how well the Primal Sleep formula works as a whole, which may be a concern to consumers. However, while the manufacturer doesn’t offer a free trial, this brand does have a money-back guarantee which is appreciated as there are reports that it may cause gastric discomfort for some customers who would obviously want to get a refund in this circumstance.

Dietary supplement recommendations can be found everywhere — in commercials, through social media influencers, and from your neighbors, friends, and family. With so many different opinions, it can be hard to know which supplement is right for you. While most quality supplements undoubtedly provide health benefits, each will work in its own unique way, so it's important to determine which one will help you reach your health goals. Below you will find our subjective assessment of ZzzQuil based on the information available to us and our estimation of its overall efficacy.

  • Falls Asleep Faster
  • Improves Sleep Pattern
  • Feels Relaxed & Tranquil
  • Promotes Deep Sleep
  • Overall User Experience

Overall Rating


Somulin - A Better Alternative?

Falls Asleep Faster
Improves Sleep Pattern
Feels Relaxed & Tranquil
Promotes Deep Sleep
Overall User Experience

Somulin is a potent natural sleep aid that improves the overall quality and duration of sleep by 96% in just 7 days!

The safe, maximum strength Somulin formula works quickly without ever creating a dependency. Its powerful blend of clinically proven ingredients helps individuals fall asleep faster and enjoy undisturbed rest throughout the night, so they wake up refreshed and alert the next day.

You can find out more about Somulin by reading our full review below.

Read More About Somulin Nowarrow

Final Words

While there are many other products for sleep that do not contain Diphenhydramine as a key ingredient, we think ZzzQuil is an "OK" product, especially for the medication in its price range.

The drug may cause side effects in some users or from with prolonged use but generally, used as directed; it is mostly free of chronic side effects. That said, like many sleep medications, it may not be suitable for pregnant or nursing mothers (the key ingredient can pass into breast milk) and the operation of machinery should be avoided after use.

Also, be sure to consult with your health professional before using medications containing similar ingredients. Also, consult your health professional if you think that the ingredients in this medication may interact with other medicines you are currently using if any. And finally, stop the ZzzQuil if you notice any prolonged or chronic side effects and seek medical care immediately.

**The above is a subjective review. Our opinion of the product’s efficacy was based on independent research and information. *Results from using this product may vary. If you have a serious medical condition, a history of heart conditions, are pregnant or nursing, we recommend that you speak to your healthcare provider before using this, or any other health product and/ or supplement. The content provided on Health Web Magazine is only intended for your informational purposes and should not be regarded as a substitute for advice from a healthcare professional. It should not be used to diagnose, treat, cure, or prevent any health condition, and we will not be held responsible for any complications that may arise from you using it for any of those aforementioned reasons. All concerns regarding your personal health must be dealt with directly by your healthcare provider.

Disclosure of Material Connection : Products shown in the section titled ‘Our Top Products’ are those that we promote as the owner and/ or reseller and does not represent all products currently on the market or companies manufacturing such products. This information is disclosed in accordance with the Federal Trade Commission’s 16 CFR, Part 255 “Guides Concerning the Use of Endorsements and Testimonials”. We would like to make it clear that any and all links featured in this section are sales links; whenever a purchase is made via one of these links, we will receive compensation.
*Result may vary. If you are pregnant, nursing, have a serious medical condition, or have a history of heart conditions we suggest consulting with a physician before using any supplement. The information contained in this website is provided for general informational purposes only. It is not intended to diagnose, treat, cure, or prevent any disease and should not be relied upon as a medical advice. Always consult your doctor before using any supplements.


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