Many people who have trouble sleeping turn to substances like sleeping pills or alcohol for help. About 10% of people use alcohol to self-treat sleep problems. Many people use sleep medications, including over-the-counter medications, to get to sleep. However, mixing alcohol with sleep medications can be harmful. It can be dangerous even if you mix alcohol with over-the-counter sleep medications such as Zzzquil.

The Effect of Zzzquil on Sleep

Zzzquil is an over-the-counter drug that helps people get to sleep. The active drug in Zzzquil is diphenhydramine, which is an antihistamine. Diphenhydramine is sometimes used to control allergies. However, the drug also easily crosses into the brain, where it can cause sedation. The sedative properties of diphenhydramine are what make it a sleep aid. Diphenhydramine is the same drug that is in many over-the-counter products like:

  • Benadryl
  • Goodsense Allergy Relief
  • Goodsense Sleep Aid
  • Nighttime Sleep Aid
  • Simply Sleep
  • Sleep Tabs
  • Tetra-Formula Nighttime Sleep

However, some Zzzquil products contain other ingredients in addition to diphenhydramine to help you fall asleep. Two Zzzquil products also contain 10% alcohol to help as a sleep aid. The alcohol-containing Zzzquil products are:

  • ZzzQuil Calming Vanilla Cherry Liquid
  • ZzzQuil Warming Berry Liquid

The other Zzzquil products that do not contain alcohol include the Zzzquil capsules and any Zzzquil liquid that is specifically labeled alcohol-free.

The Effect of Alcohol on Sleep

Although alcohol can help you fall asleep, the sleep you have might not be high quality. Doctors believe that alcohol harms an important phase of the sleep cycle called rapid eye movement sleep, or REM sleep. If you drink before sleeping, you may have interrupted REM sleep, which can make you feel tired and less alert the next day. Experts believe this may happen even if you finish drinking up to six hours before you go to bed. Studies have shown that when you drink even a small amount, the next day you may have reduced alertness. However, in general, the more alcohol you drink, the more doctors think your sleep quality can be harmed. Additionally, alcohol may contribute to sleep-related health problems like:

Side Effects of Mixing Zzzquil and Alcohol

Because Zzzquil and alcohol depress the central nervous system, using them together can increase their side effects. These increased side effects may include:

  • Feeling very sleepy
  • Having speech that is slurred
  • Having trouble concentrating
  • Feeling confused
  • Having a headache
  • Being dizzy
  • Feeling like your mouth is very dry
  • Having problems with your memory
  • Having trouble moving
  • Having low blood pressure
  • Breathing more slowly than normal

If you are using a Zzzquil product that already has alcohol, then drinking alcohol in addition to the Zzzquil may worsen your symptoms.

An additional risk is driving. If you have had Zzzquil or alcohol. A study showed that diphenhydramine, the active ingredient in Zzzquil, caused drivers to be more impaired than alcohol. Therefore, taking alcohol with Zzzquil has the potential to impair driving. If the Zzzquil product you are taking already contains alcohol, then driving may be even more dangerous.

Key Points: Zzzquil and Alcohol

Important points related to Zzzquil and alcohol include:

  • People often use alcohol and over-the-counter sleep aids like Zzzquil to help fall asleep
  • Because they both depress the central nervous system, combining alcohol and Zzzquil may lead to increased side effects
  • Some Zzzquil products contain alcohol, so combining them with even more alcohol can worsen side effects
  • Alcohol can help you get to sleep but can also lead to poor-quality REM sleep and leave you feeling tired and less alert the next day

If you or someone you know struggles with alcohol use, with or without sleeping aids, contact The Recovery Village to speak with a representative who can help get started toward a healthier life free of alcohol and sleep aids.

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