About all

What happens when you drink too much nyquil. NyQuil Overdose: Dangers, Symptoms, and Prevention

What are the risks of consuming excessive NyQuil. How to recognize the signs of NyQuil overdose. What steps should be taken to prevent NyQuil misuse.

Understanding NyQuil: Composition and Intended Use

NyQuil is a popular over-the-counter medication designed to alleviate symptoms associated with the common cold, flu, and other respiratory illnesses. Its primary components include:

  • Dextromethorphan: A cough suppressant
  • Acetaminophen: A pain reliever and fever reducer
  • Doxylamine: An antihistamine
  • Phenylephrine: A decongestant (in some formulations)

While NyQuil can be effective when used as directed, consuming excessive amounts can lead to serious health risks. Understanding its composition is crucial for recognizing potential dangers.

Why do people misuse NyQuil?

Some individuals may be tempted to consume more NyQuil than recommended for various reasons:

  • Seeking stronger symptom relief
  • Attempting to induce sleep
  • Pursuing a “high” from dextromethorphan
  • Misunderstanding dosage instructions

However, these motivations can lead to dangerous outcomes and should be avoided.

The Dangers of Acetaminophen Overdose

One of the most significant risks associated with excessive NyQuil consumption is acetaminophen overdose. Acetaminophen, also known as APAP or paracetamol, can cause severe liver damage when taken in large quantities.

What is the safe dosage limit for acetaminophen?

Adults should not exceed 4,000 milligrams (4 grams) of acetaminophen per day. For individuals with liver problems or children, the safe limit is even lower. It’s crucial to consult a healthcare professional to determine appropriate dosages based on individual factors.

Acetaminophen is present in numerous medications, both prescription and over-the-counter. Always check labels and consult a pharmacist to avoid unintentional overconsumption.

How does acetaminophen affect the liver?

When taken in excessive amounts, acetaminophen can overwhelm the liver’s ability to process the drug safely. This can lead to the accumulation of toxic byproducts, potentially resulting in acute liver failure. The risk is further increased when combined with alcohol consumption.

Recognizing NyQuil Overdose Symptoms

Identifying the signs of NyQuil overdose is crucial for seeking timely medical intervention. Symptoms may include:

  • Nausea and vomiting
  • Loss of appetite
  • Excessive sweating
  • Abdominal pain
  • Extreme fatigue
  • Yellowing of the skin or eyes (jaundice)
  • Dark urine
  • Confusion or disorientation
  • Difficulty breathing
  • Irregular heartbeat

If you or someone you know experiences these symptoms after consuming NyQuil, seek immediate medical attention, even if the person appears to be feeling better.

Can NyQuil overdose symptoms be delayed?

Yes, some symptoms of acetaminophen overdose may not appear immediately. Liver damage can progress silently for several days before noticeable symptoms emerge. This delayed onset makes it crucial to seek medical help promptly if an overdose is suspected, regardless of how the person feels initially.

The Impact of Dextromethorphan Misuse

Dextromethorphan (DXM), the cough suppressant in NyQuil, can produce dissociative effects when taken in large doses. This has led to its misuse as a recreational drug, particularly among teenagers and young adults.

What are the risks of DXM abuse?

Excessive consumption of dextromethorphan can lead to:

  • Hallucinations and dissociative experiences
  • Impaired judgment and coordination
  • Rapid heart rate and high blood pressure
  • Nausea and vomiting
  • Seizures in severe cases
  • Potential for addiction and withdrawal symptoms

Long-term abuse of DXM can result in cognitive impairment, mental health issues, and organ damage. It’s essential to use NyQuil only as directed and be aware of the dangers of intentional misuse.

Interactions with Alcohol and Other Substances

Combining NyQuil with alcohol or other drugs can significantly increase the risk of adverse effects and overdose. The interaction between acetaminophen and alcohol is particularly dangerous, as it can accelerate liver damage.

Why is mixing NyQuil and alcohol dangerous?

When alcohol and NyQuil are consumed together:

  • The liver’s ability to process acetaminophen is compromised
  • Sedative effects are intensified, increasing the risk of respiratory depression
  • Cognitive impairment and coordination problems are exacerbated
  • The risk of accidental overdose increases

It’s crucial to avoid alcohol consumption when using NyQuil or any medication containing acetaminophen. Additionally, be cautious about interactions with other medications, particularly those that may cause drowsiness or affect liver function.

Prevention and Safe Usage Guidelines

To ensure the safe and effective use of NyQuil, follow these guidelines:

  1. Always read and follow the label instructions carefully
  2. Use the provided measuring device to ensure accurate dosing
  3. Do not exceed the recommended daily limit
  4. Avoid using NyQuil with other acetaminophen-containing products
  5. Consult a healthcare professional before use if you have liver problems or are taking other medications
  6. Never use NyQuil to induce sleep or for recreational purposes
  7. Keep NyQuil and other medications out of reach of children
  8. Be aware of the signs of overdose and seek immediate medical attention if suspected

Is NyQuil safe for everyone to use?

While NyQuil is generally safe when used as directed, certain individuals should exercise caution or avoid its use:

  • Children under 12 years old
  • Pregnant or breastfeeding women
  • People with liver or kidney disease
  • Individuals with certain medical conditions (e.g., high blood pressure, glaucoma)
  • Those taking medications that may interact with NyQuil components

Always consult a healthcare provider if you have concerns about using NyQuil or any other over-the-counter medication.

Alternative Symptom Management Strategies

While NyQuil can be effective for short-term symptom relief, it’s important to consider alternative methods for managing cold and flu symptoms, especially if you’re concerned about medication use:

  • Stay hydrated by drinking plenty of fluids
  • Use a humidifier to ease congestion
  • Try saline nasal sprays or rinses
  • Get plenty of rest to support your immune system
  • Use honey for cough suppression (for adults and children over 1 year)
  • Consider steam inhalation for congestion relief
  • Explore natural remedies like ginger or elderberry (consult a healthcare provider first)

When should you see a doctor instead of using over-the-counter medications?

While many cold and flu symptoms can be managed at home, certain situations warrant medical attention:

  • Fever above 103°F (39.4°C) or lasting more than three days
  • Difficulty breathing or chest pain
  • Persistent vomiting or inability to keep fluids down
  • Symptoms lasting more than 10 days
  • Severe headache or sinus pain
  • Signs of dehydration
  • Worsening of chronic medical conditions

In these cases, it’s best to consult a healthcare professional for appropriate treatment and to avoid potential complications.

The Importance of Medication Awareness and Education

Understanding the risks associated with NyQuil and other over-the-counter medications is crucial for public health. Increased awareness can help prevent accidental overdoses and intentional misuse.

How can we promote safer medication use in communities?

Several strategies can be employed to enhance medication safety:

  • Implement educational programs in schools and community centers
  • Encourage open communication between healthcare providers and patients
  • Promote proper medication storage and disposal practices
  • Support initiatives for clear and accessible medication labeling
  • Raise awareness about the dangers of mixing medications with alcohol or other substances
  • Provide resources for individuals struggling with substance abuse or addiction

By fostering a culture of medication awareness, we can reduce the incidence of overdoses and promote healthier communities.

What role do pharmacists play in preventing medication misuse?

Pharmacists are crucial in promoting safe medication use:

  • Offering medication counseling and answering patient questions
  • Screening for potential drug interactions
  • Providing clear instructions on proper dosing and administration
  • Educating patients about the risks of medication misuse
  • Recommending appropriate alternatives when necessary
  • Participating in community health initiatives and education programs

Engaging with pharmacists can significantly enhance medication safety and prevent potential misuse or overdose situations.

NyQuil Oral: Uses, Side Effects, Interactions, Pictures, Warnings & Dosing

Warnings:

One ingredient in this product is acetaminophen. Taking too much acetaminophen may cause serious (possibly fatal) liver disease. Adults should not take more than 4000 milligrams (4 grams) of acetaminophen a day. People with liver problems and children should take less acetaminophen. Ask your doctor or pharmacist how much acetaminophen is safe to take.

Do not use with any other drug containing acetaminophen without asking your doctor or pharmacist first. Acetaminophen is in many nonprescription and prescription medications (such as pain/fever drugs or cough-and-cold products). Check the labels on all your medicines to see if they contain acetaminophen, and ask your pharmacist if you are unsure.

Get medical help right away if you take too much acetaminophen (overdose), even if you feel well. Overdose symptoms may include nausea, vomiting, loss of appetite, sweating, stomach/abdominal pain, extreme tiredness, yellowing eyes/skin, and dark urine.

Daily alcohol use, especially when combined with acetaminophen, may damage your liver. Avoid alcohol.

Warnings:

One ingredient in this product is acetaminophen. Taking too much acetaminophen may cause serious (possibly fatal) liver disease. Adults should not take more than 4000 milligrams (4 grams) of acetaminophen a day. People with liver problems and children should take less acetaminophen. Ask your doctor or pharmacist how much acetaminophen is safe to take.

Do not use with any other drug containing acetaminophen without asking your doctor or pharmacist first. Acetaminophen is in many nonprescription and prescription medications (such as pain/fever drugs or cough-and-cold products). Check the labels on all your medicines to see if they contain acetaminophen, and ask your pharmacist if you are unsure.

Get medical help right away if you take too much acetaminophen (overdose), even if you feel well. Overdose symptoms may include nausea, vomiting, loss of appetite, sweating, stomach/abdominal pain, extreme tiredness, yellowing eyes/skin, and dark urine.

Daily alcohol use, especially when combined with acetaminophen, may damage your liver. Avoid alcohol.

… Show More

Uses

This combination medication is used to temporarily treat symptoms caused by the common cold, flu, allergies, or other breathing illnesses (such as sinusitis, bronchitis). Dextromethorphan is a cough suppressant that affects a certain part of the brain, reducing the urge to cough. Decongestants help relieve stuffy nose and ear congestion symptoms. Acetaminophen (APAP) is a non-aspirin pain reliever and fever reducer. Antihistamines help relieve watery eyes, itchy eyes/nose/throat, runny nose, and sneezing.This medication is not usually used for ongoing coughs from smoking, asthma, or other long-term breathing problems (such as emphysema), or for coughs with a lot of mucus, unless directed by your doctor.Cough-and-cold products have not been shown to be safe or effective in children younger than 6 years. Do not use this product to treat cold symptoms in children younger than 6 years unless specifically directed by the doctor. Some products (such as long-acting tablets/capsules) are not recommended for use in children younger than 12 years. Ask your doctor or pharmacist for more details about using your product safely.These products do not cure or shorten the length of the common cold and may cause serious side effects. To decrease the risk for serious side effects, carefully follow all dosage directions. Do not use this product to make a child sleepy. Do not give other cough-and-cold medication that might contain the same or similar ingredients (see also Drug Interactions section). Ask the doctor or pharmacist about other ways to relieve cough and cold symptoms (such as drinking enough fluids, using a humidifier or saline nose drops/spray).

How to use Nyquil Liquid

See also Warning section.

If you are taking the over-the-counter product, read and follow all directions on the package label. If your doctor has prescribed this medication for you, take as directed by your doctor. If you have any questions, consult your doctor or pharmacist.

Take this medication by mouth with or without food or as directed by your doctor. If stomach upset occurs, it may help to take this medication with food or milk. Drink plenty of fluids when you use this medication unless otherwise directed by your doctor. The fluid will help loosen the mucus in your lungs.

If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. If your liquid form is a suspension, shake the bottle well before each dose.

If you are taking extended-release capsules, swallow them whole. Do not crush or chew extended-release capsules or tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split extended-release tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing.

If you are taking the chewable form of this medication, chew it thoroughly before swallowing.

The dosage is based on your age, medical condition, and response to treatment. Do not increase your dose, take it more often, or use it for a longer time than directed. Improper use of this medication (abuse) may result in serious harm (including brain damage, seizure, death).

Tell your doctor if your condition lasts for more than 1 week, if it gets worse, or if it occurs with a headache that doesn’t go away, rash, or fever lasting more than 3 days. These may be symptoms of a serious medical problem and should be checked by a doctor.

Side Effects

See also Warning section.

Drowsiness, dizziness, blurred vision, upset stomach, nausea, nervousness, constipation, or dry mouth/nose/throat may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

If your doctor has prescribed this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as confusion, hallucinations), shaking, trouble urinating, fast/slow/irregular heartbeat, seizure.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US – Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

In Canada – Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Precautions

See also Warning section.

Before taking this product, tell your doctor or pharmacist if you are allergic to any of its ingredients; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

If you have any of the following health problems, consult your doctor or pharmacist before using this medication: breathing problems (such as asthma, emphysema), diabetes, glaucoma, heart problems, high blood pressure, kidney problems, liver disease, seizures, stomach/intestinal problems (such as blockage, constipation, ulcers), overactive thyroid (hyperthyroidism), urination problems (such as trouble urinating due to enlarged prostate, urinary retention).

This drug may make you dizzy or drowsy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Avoid alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

Some brands of this product may contain sugar, alcohol, or aspartame. Caution is advised if you have diabetes, alcohol dependence, liver disease, phenylketonuria (PKU), or any other condition that requires you to limit/avoid these substances in your diet. Ask your doctor or pharmacist about using this product safely.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Older adults may be more sensitive to the effects of this drug, especially dizziness, drowsiness, mental/mood changes, constipation, trouble urinating, fast heartbeat, and blood pressure changes. Dizziness, drowsiness and confusion can increase the risk of falling.

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

This medication may pass into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

Interactions

See also Warning section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.

Taking certain MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking isocarboxazid, metaxalone, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, or tranylcypromine during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. Ask your doctor when to start or stop taking this medication.

Some products that may interact with this drug are: antihistamines applied to the skin (such as diphenhydramine cream, ointment, spray), ketoconazole, levoketoconazole, rolapitant.

Tell your doctor or pharmacist if you are taking other products that cause drowsiness such as opioid pain or cough relievers (such as codeine, hydrocodone), alcohol, marijuana (cannabis), drugs for sleep or anxiety (such as alprazolam, lorazepam, zolpidem), muscle relaxants (such as carisoprodol, cyclobenzaprine), or other antihistamines (such as cetirizine, diphenhydramine).

The ingredients in this product are available in many prescription and nonprescription products. Check the labels on all your medicines (such as pain/fever drugs, diet aids, or cough-and-cold/allergy products) because they may contain the same or similar ingredients. Using these drugs along with this product could increase side effects (such as fast heartbeat, increased blood pressure, or drowsiness). Ask your pharmacist about using those products safely.

This medication may interfere with certain lab tests (such as urine drug screening tests, urine 5-HIAA), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.

Does Nyquil Liquid interact with other drugs you are taking?

Enter your medication into the WebMD interaction checker

Overdose

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: nausea, vomiting, loss of appetite, sweating, stomach/abdominal pain, extreme tiredness, agitation, confusion, flushing, hallucinations, yellowing eyes/skin, dark urine, seizures. In children, excitement may occur first, and may be followed by: loss of coordination, drowsiness, loss of consciousness, seizures.

Keep all medical and lab appointments.

Do not take this product for several days before allergy testing because test results can be affected.

If you are taking this product on a regular schedule and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

Store at room temperature away from light and moisture. Do not store in the bathroom. Do not freeze liquid forms of this medication. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Images

Next

Save up to 80% on your prescriptions.

Available coupons

Save up to 80% on your prescription with WebMDRx

Drug Survey

Have you ever purchased Nyquil Liquid?

Yes, In the past 3 months

Yes, In the past 6 months

Yes, In the past year

Haven’t purchased but considering

Don’t plan to purchase

This survey is being conducted by the WebMD marketing sciences department.

Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

Can you overdose on Nyquil?

Medically reviewed by Carmen Pope, BPharm. Last updated on Feb 24, 2022.

Yes, you can overdose on Nyquil if you take more than recommended, give a child more than is recommended, or you give Nyquil to a child who is under the age of 6 years.

Nyquil contains acetaminophen (relieves pain and fever), doxylamine (an antihistamine that will dry up nasal secretions but can cause drowsiness), and dextromethorphan (to stop you from coughing).

There are a lot of different formulations of Nyquil so you must check the product label or ask your pharmacist if you are unsure what the correct dosage of Nyquil is. Always carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Ask your pharmacist for a measuring spoon.

The usual recommended dosage of Nyquil liquid is:

  • Children aged less than 6 years: Not recommended, do not give Nyquil to a child under 6 years
  • Children aged 6 to 11 years: 15mL every 6 hours if needed.
  • Teenagers aged 12 years or older: 30mL every 6 hours if needed
  • Adults: 30 mL every 6 hours if needed.

Do not give Nyquil more often than every 6 hours and do not give more than 4 doses per day.

For NyQuil liquid caps the dosage is:

  • Teenagers aged 12 years or older: 2 capsules every 6 hours if needed
  • Adults: 2 capsules every 6 hours if needed.

Do not give Nyquil liquid caps more often than every 6 hours and do not give more than 4 doses per day.

Because Nyquil contains 3 ingredients, acetaminophen, dextromethorphan, and doxylamine, taking more than recommended can exceed the recommended daily dose for any one of those ingredients.

Symptoms of Nyquil overdose may include:

  • Difficulty breathing
  • Dilated pupils or blurred vision
  • Dry mouth
  • Hallucinations
  • Have difficulty passing urine or not passing as much urine as usual for you
  • Hyperactivity
  • Insomnia
  • Excessive tiredness or sleepiness
  • Liver problems such as dark urine, feeling tired, poor appetite, abdominal (stomach) pain, light-colored stools, throwing up, or yellow skin or eyes
  • Seizures
  • Severe dizziness
  • Severe anxiety

A large Nyquil overdose may be potentially fatal.

References

  • Vicks Products. Online. Frequently asked questions (FAQs). Accessed Feb. 24, 2022 at https://vicks.com/en-us/safety-and-faqs/faqs/vicks-nyquil-faq
  • Vicks NyQuil Products. Online. Accessed Feb. 24, 2022 at https://vicks.com/en-us/shop-products/nyquil

Related medical questions

  • Which breathing techniques help with COVID-19?
  • What is Rosel used for?
  • What are the side effects of the flu vaccine?
  • COVID-19 vaccines and variants: What you should know
  • How long is the flu contagious for?
  • Should I wear a face mask to protect myself from COVID-19?
  • How long does the flu last for?
  • Can Ivermectin be used to treat COVID-19?
  • Can you take Ibuprofen if you have COVID-19 (coronavirus)?
  • What antibiotics kill Covid-19 (coronavirus)?
  • What’s the difference between Bacteria and Viruses?

Related support groups

  • NyQuil
    (52 questions, 33 members)
  • Influenza
    (104 questions, 98 members)
  • Cold Symptoms
    (40 questions, 42 members)

Medical Disclaimer

How to cure a swollen tongue?

Mild cases of uvulitis are treated with a salt water rinse; over-the-counter anti-inflammatory drugs such as ibuprofen or naproxen; and adequate fluid intake, according to WebMD. More severe cases may require treatment with antibiotics, steroids, and/or antihistamines, according to Drugs.com.

Uvulitis, a large swelling of tissue hanging down the back of the throat, is most commonly caused by infection, an allergic reaction, or trauma, explains Drugs.com. As Christine Hayes points out for About.com, patients with uvulitis usually have swelling and irritation all over their throat and mouth. It rarely occurs in isolation.

Mild cases can be treated at home with sore throat remedies. Gargling with salt water several times a day soothes inflamed tissues and reduces pain, claims WebMD. Mix 1/2 teaspoon of salt with warm water, rinse thoroughly and spit out. If the salty taste is unbearable, adding honey will make the rinse more enjoyable. OTC anti-inflammatory drugs also relieve pain and relieve swelling. Staying hydrated and using a vaporizer or humidifier can also increase comfort.

Antibiotics are used to treat bacterial causes of uvulitis, explains Hayes.