From the manufacturer

Fast-acting solutions for occasional sleeplessness. ZzzQuil liquids are crafted by the experts at Vicks, a team with an unparalleled track record of providing innovative products to families like yours for over 125 years.

Melatonin supplementation has been clinically demonstrated to improve sleep onset, duration, and quality. For those who have difficulty staying asleep, extended-release melatonin can deliver a full night's sleep without interruptions.

Ingredients. Pure Zzzs Blend: Chamomile (Matricaria Recutita L,) Flower Extract, Lemon Balm (Melissa Officinalis L,) Leaf Extract, Valerian (Valeriana Officinalis L,) Root Extract, Lavender (Lavandula Officinalis Chaix) Flower Extract.

Drowsiness, dizziness, constipation, stomach upset, blurred vision, or dry mouth/nose/throat may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To relieve dry mouth, suck (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water, or use a saliva substitute.

Our PURE Zzzs line uses the active ingredient melatonin, which is a hormone that occurs naturally in your body. While each have been shown to be safe and effective, you should choose the product that works best for you and your body.

Common side effects

• Feeling sleepy or tired in the daytime. Do not drive, cycle or use tools or machinery if you're feeling this way.
• Headache. Make sure you rest and drink plenty of fluids.
• Stomach ache.
• Feeling sick (nausea)
• Feeling dizzy.
• Feeling irritable or restless.
• Dry mouth.
• Dry or itchy skin.

Share on Pinterest Side effects of diphenhydramine can include headaches and drowsiness. Diphenhydramine, which is the active ingredient in ZzzQuil, can cause side effects in some people. The most common side effects of diphenhydramine include : drowsiness.

What are the health benefits of taking melatonin? Melatonin supplements may help with certain conditions, such as jet lag, delayed sleep-wake phase disorder, some sleep disorders in children, and anxiety before and after surgery.

Common side effects

• Feeling sleepy or tired in the daytime. Do not drive, cycle or use tools or machinery if you're feeling this way.
• Headache. Make sure you rest and drink plenty of fluids.
• Stomach ache.
• Feeling sick (nausea)
• Feeling dizzy.
• Feeling irritable or restless.
• Dry mouth.
• Dry or itchy skin.

Diphenhydramine HCL Our original ZzzQuil formula has the active ingredient Diphenhydramine HCL, an antihistamine, while our PURE Zzzs formula has the hormone melatonin.

Love that it's all natural/ plant based ingredients.” “ZzzQuil Pure Zzzs Herbal tablets are melatonin free and are very effective for my occasional sleeplessness.

Less common melatonin side effects might include short-lasting feelings of depression, mild tremor, mild anxiety, abdominal cramps, irritability, reduced alertness, confusion or disorientation. Because melatonin can cause daytime drowsiness, don't drive or use machinery within five hours of taking the supplement.