Dayquil provides all day, non-drowsy relief of your toughest cold & flu symptoms. 

Dayquil Tablets

  • Introduction


    If you want an all-in-one product for symptoms of the common cold and flu that also won’t put you to sleep, DayQuil Cold & Flu may get the job done. Learn how it works, the forms it comes in and the dosages for each, as well as what you should watch out for before and while you take it.




    About DayQuil

    DayQuil Cold & Flu is a combination product that contains the active ingredients acetaminophen, dextromethorphan, and phenylephrine. It temporarily treats symptoms of the common cold and flu. These symptoms include:

    • fever
    • cough
    • nasal congestion
    • minor aches and pains
    • headache
    • sore throat

    DayQuil is made for use during the day. Unlike NyQuil, it doesn’t contain the active ingredient doxylamine, which is an antihistamine that can make you feel drowsy.


    How does it work?


    Acetaminophen is a fever reducer and a pain reliever. It works by changing the way your body senses pain. It also changes how your body regulates its temperature. Dextromethorphan suppresses your urge to cough. The third ingredient, phenylephrine, is a nasal decongestant. It reduces the swelling of the blood vessels in your nasal passages.


    What are the forms and dosages?

    DayQuil comes in liquid-filled capsules called LiquiCaps. It also comes as a liquid that you drink. The following table lists the recommended dosage for each form by age group. Ask your doctor for the correct dosage for children ages 4 to 5 years, and don’t give DayQuil to children who are younger than 4 years.

    Recommended dosage LiquiCaps Liquid
    Adults and children 12 years and older two capsules every 4 hours as needed, no more than four doses in 24 hours 30 mL every 4 hours as needed, no more than 4 doses in 24 hours
    Children ages 6-11 years Ask your doctor 15 mL every 4 hours as needed, no more than four doses in 24 hours
    Children ages 4-5 years Ask your doctor Ask your doctor
    Children younger than 4 years Do not use Do not use

    If your symptoms don’t improve or if they get worse after taking DayQuil for two days, see your doctor.


    Side effects

    DayQuil can cause some unwanted side effects. Most of these side effects don't need medical attention. Rather, they may go away as your body adjusts to the medication. You can ask your doctor about any mild side effects you have that are bothersome or don’t go away.


    More common side effects

    The more common side effects of DayQuil can include:

    • lightheadedness
    • drowsiness
    • stomach pain
    • nausea
    • vomiting
    • nervousness
    • dizziness
    • trouble sleeping

    Also, avoid drinking grapefruit juice while taking this drug. Grapefruit juice might increase the levels of dextromethorphan, one of the ingredients in DayQuil. Higher levels increase your chance of side effects such as nervousness and dizziness.


    Serious side effects

    One serious side effect of DayQuil is an allergic reaction. Symptoms include:

    • rash
    • hives
    • itching
    • red, peeling, or blistering skin
    • itchiness
    • difficulty breathing
    • trouble swallowing
    • swelling of your face, throat, tongue, or lips
    • swelling of your hands, legs, ankles, or feet

    Contact your doctor right away or get emergency medical help if you have any of these symptoms while taking DayQuil.