Alcohol and Melatonin: Side Effects, Risks, and Interactions

Melatonin supplements are available at most drug stores as an alternative to prescription sleep medications. People take melatonin to treat sleep disorders like insomnia, but combining it with other drugs like alcohol can have devastating effects.

Learn more about the side effects and risks of combining melatonin and alcohol, the side effects, and the possible risks.

What Is Melatonin?

Melatonin is a natural hormone the body makes to regulate the circadian rhythm or sleep cycle. Most melatonin is produced after dark, between 11 pm and 3 am, to promote a regular sleep schedule.[1]

About 25 million US adults experience insomnia symptoms.[2] While prescription sleeping pills are available for sleep disorders, they have risks. Instead of taking prescription medications, some people prefer to try natural remedies like melatonin.

Melatonin is generally safe and well tolerated. There are few side effects at regular doses, but melatonin supplements aren’t standardized or well-regulated. When you use melatonin from a drug store, you can’t be sure exactly what you’re taking.

Melatonin also has potential drug interactions. Taking melatonin with diabetes medications, birth control pills, blood thinners, immunosuppressants, and drugs that have a sedative effect, including alcohol, is unsafe.

There can be side effects with melatonin, including:[3]

• Sleep problems
• Daytime grogginess
• Abnormal dizziness
• Headaches
• Depression

Can You Drink Alcohol While Taking Melatonin?

Melatonin is a commonly used remedy for sleep difficulties, but people struggling with insomnia may use other options. Having an alcoholic drink, a “nightcap,” is a common way to help with sleep, but doing so can be counterproductive. Alcohol can make sleep problems worse and prevent very deep sleep.

Mixing melatonin with alcohol can cause side effects. Alcohol reduces the amount of melatonin that your body creates, worsening sleep patterns. It can also affect the muscles in your airway, impacting your breathing patterns and causing sleep apnea.

Mixing alcohol and melatonin can have more serious side effects, including:[4]

• Poor focus
• Drowsiness
• Dizziness
• Nightmares
• Anxiety

Mixing melatonin and alcohol can affect your liver’s ability to create enzymes, causing flushing, swelling in the extremities, trouble focusing, breathing difficulties, and a fast heart rate:[5]

The effects of alcohol can vary from person to person due to age, individual genetics, and existing health conditions. You may not be able to determine how alcohol will affect you when you take melatonin, so it’s best to abstain from alcohol while you’re on it. In addition to the risks, drinking alcohol can make a melatonin supplement less effective.

Can You Die From Combining Melatonin and Alcohol?

For most healthy adults, combining melatonin and alcohol is not usually life threatening by itself. Melatonin is generally safe at typical doses, and alcohol does not create the same kind of direct fatal interaction with melatonin that it can with opioids, benzodiazepines, or some prescription sleep medications.

However, the combination can still become dangerous. Alcohol and melatonin can both cause sedation. Together, they may increase excessive drowsiness, impaired coordination, poor judgment, slowed reaction time, and fall risk. For older adults, these effects can be especially concerning because alcohol may increase the risk of falls, injuries, medication interactions, and overdose when combined with sedating medications.[6]

The bigger danger often comes from the situation around the combination. For example, someone may take melatonin after drinking, become too sedated, fall, drive impaired, mix in other sleep medications, or fail to recognize alcohol poisoning. Heavy drinking can also cause life-threatening alcohol overdose, with symptoms such as confusion, vomiting, seizures, slow or irregular breathing, pale or clammy skin, low body temperature, or loss of consciousness.[7]

Breathing-related risks also matter. Alcohol can worsen obstructive sleep apnea because it relaxes airway muscles and may make breathing events during sleep more likely.[8] If someone has sleep apnea and takes melatonin after drinking, excessive sedation may make it harder to wake fully during breathing disruptions.

Call 911 immediately if someone is hard to wake, breathing slowly or irregularly, vomiting while unconscious, having seizures, or showing signs of alcohol poisoning.

Who’s at Risk for Interactions with Melatonin and Alcohol?

Combining alcohol and melatonin always has risks, but it can be worse for some people:

• If you’re on blood thinners, alcohol can affect your body’s ability to metabolize them. You may have serious bleeding. Research shows that melatonin may have a similar effect, so the two together could be dangerous.[9]
• If you’re on anxiety medications like alprazolam, consuming alcohol can have serious effects like dangerously depressed breathing or severe drowsiness.[10]
• If you’re taking melatonin, alcohol, or both with other sleep aids like diphenhydramine or valerian root, it can cause severe drowsiness that may increase the risk of injuries or death.[11]
• Older adults (over 65) can have a higher risk of complications from alcohol and melatonin. The effects of alcohol can be more intense for older people than younger people, leading to a risk of interactions.[12]
• Women have lower water content in their bodies, leading to higher blood alcohol concentrations (BACs) than men, even with the same amount of alcohol.[13] This can make alcohol interactions with melatonin more intense.

Does Alcohol Help with Sleep Problems?

Insomnia is sleep disruptions or trouble falling asleep, staying asleep, or experiencing restful sleep that can affect day-to-day routine. Chronic insomnia can lead to next-day tiredness, affecting performance at work or other responsibilities. Insomnia can have health consequences over time.

The sedative effects of alcohol make some people reach for it to get to sleep. However, alcohol’s sedative effects cause drowsiness, but they don’t help you get a restful sleep. Alcohol lowers the amount of rapid eye movement (REM) sleep, which is the deep stage of sleep and can cause sleep disturbances.[14] This means you won’t get quality sleep and may feel tired the next day.

If you routinely use alcohol to improve sleep patterns, you can get into a pattern of self-medicating insomnia. You may use caffeine the next day to stay awake and alert because you didn’t sleep well, causing more disruption to your sleep cycle. You could develop a dependence on alcohol, caffeine, or both.

How Mixing Melatonin and Alcohol Can Affect the Next Day

The effects of mixing melatonin and alcohol may not end when you wake up. Some people feel foggy, dizzy, groggy, anxious, or less coordinated the next day. Others may notice vivid dreams, fragmented sleep, daytime sleepiness, or trouble focusing.

Possible next-day effects include:

• Excessive drowsiness
• Poor coordination
• Slowed reaction time
• Headache
• Irritability
• Low motivation
• Brain fog
• Reduced mental clarity
• Increased fall risk
• Worsened anxiety
• Continued sleepiness while driving or working

These effects may be stronger with higher doses of melatonin, more alcohol, poor sleep, older age, other medications, or other substances.

Safer Ways to Support Better Sleep

Healthy sleep habits can be more effective and safer than combining melatonin with alcohol. NCCIH notes that lifestyle approaches such as good sleep habits and alcohol cessation may help improve sleep apnea in some people.[15]

Safer sleep support strategies include:

• Keep a consistent sleep schedule.
• Avoid alcohol close to bedtime.
• Limit caffeine later in the day.
• Keep the bedroom cool, dark, and quiet.
• Reduce screen exposure before bed.
• Get sunlight during daylight hours.
• Use relaxation techniques before sleep.
• Ask a provider about sleep apnea symptoms.
• Avoid combining sleep aids with alcohol.
• Talk with a healthcare professional before mixing supplements and medications.

Some people also use chamomile tea or lemon balm as part of a bedtime routine, but herbal products can still interact with medications. Ask a provider before using herbal supplements, especially if you take blood thinners, blood pressure medications, sedatives, or other prescription medications.

When Alcohol Use and Sleep Problems Need Support

If you need alcohol to sleep, cannot cut back, drink despite negative consequences, or feel anxious when you try to avoid alcohol, support can help. Alcohol use can worsen sleep quality, and poor sleep can make alcohol cravings harder to manage.

At Epiphany Wellness, we help people understand alcohol use, sleep problems, mental health, and recovery needs with compassionate care. If drinking alcohol has become part of your nightly routine or you are worried about mixing melatonin and alcohol, reach out to us. Our team can help you explore treatment options and take the next step toward better sleep and overall well-being.