Drugs Q & A

Does DayQuil Keep You Awake?

A number of common medications can prevent you from falling asleep or staying asleep; others can make you groggy or sleepy during the day. Chemicals work differently on everyone, so a given medication may not affect you and your best friend the same way, but certain drugs could cause sleep problems for most people.

What is 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 dosageLiquiCapsLiquid
Adults and children 12 years and oldertwo capsules every 4 hours as needed, no more than four doses in 24 hours30 mL every 4 hours as needed, no more than 4 doses in 24 hours
Children ages 6-11 yearsAsk your doctor15 mL every 4 hours as needed, no more than four doses in 24 hours
Children ages 4-5 yearsAsk your doctorAsk your doctor
Children younger than 4 yearsDo not useDo not use

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

Does DayQuil Keep You Awake?

No, DayQuil typically will not keep you awake if you take it at night time, and in general, it usually does not cause sleepiness. The main difference between DayQuil and NyQuil is that DayQuil does not contain antihistamines while NyQuil contains antihistamines. Antihistamines are known to cause drowsiness.

What should you do if your medications are causing insomnia?

Sleep is important to your health, so insomnia that doesn’t go away isn’t something to overlook.

If you think your medications are causing insomnia, you should talk to your healthcare provider about it. They may:

•          Recommend an alternative medication

•          Reduce your medication dose

•          Recommend a supplement like melatonin to help promote sleep

•          Prescribe a stronger medication to help you sleep

Tips for better sleep

There are also some strategies you can take on your own to promote better sleep. Here are a few you can try, starting today:

•          Establish a bedtime routine: Turn off bright screens and any sources of blue light (like TVs, laptops, or smartphones), keep your room dim or dark and engage in a calming activity like a bath, shower, or meditation.

•          Avoid physical activity several hours before bedtime: Getting your heart rate up throughout the day is a great way to stay healthy and promote more sound sleep. But if you exercise too close to bedtime, your body may not have enough time to settle, which can cause trouble falling asleep.

•          Avoid caffeine late in the day: Save your coffee and tea breaks for the morning and early afternoon. Caffeine too late in the evening can disrupt your sleep. If you enjoy warm tea to relax before bed, try a caffeine-free option like chamomile or lavender.

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