DayQuil Severe Cold and Flu is a combination medicine used to treat headache, fever, body aches, cough, chest congestion, stuffy nose, and sinus congestion caused by allergies, the common cold, or the flu. DayQuil Severe Cold and Flu will not treat a cough that is caused by smoking, asthma, or emphysema.

You can take DayQuil every four hours, with no more than six doses in 24 hours. Will DayQuil make you tired? Even though it is marketed for daytime use, some people who take DayQuil report it makes them tired. Common side effects of DayQuil include nervousness, dizziness, or sleepiness.

This medication works quickly to provide daytime relief for colds and flu. Temporary relief from these conditions lasts for about 4 hours. Although DayQuil can reduce cold and flu symptoms, it does not cure either condition.

Only use the dose cup provided. Do not exceed 4 doses per 24 hrs. Adults & children 12 yrs & over: 30 mL every 4 hrs. Children 6 to under 12 yrs: 15 mL every 4 hrs.

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.

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.

DayQuil is designed to provide temporary relief from symptoms of the common cold and flu during the day. It contains active ingredients that can cause wakefulness and may interfere with your sleep patterns if taken in the evening or at bedtime.

This can trigger receptors in your brain that make you think you are breathing more clearly. But VapoRub isn't a decongestant. Studies have shown that using Vicks VapoRub according to the instructions on the package may help improve sleep quality.

Each active ingredient in DayQuil works slightly differently to help relieve cold and flu symptoms: Acetaminophen is an analgesic. It works by blocking production of certain chemicals that contribute to both fever and pain. Dextromethorphan is a cough suppressant.

Acetaminophen is an analgesic. It blocks chemicals in your body to help relieve pain and lower fever. Dextromethorphan is a cough suppressant that works in the brain to lower your urge to cough. Phenylephrine is a decongestant that clears your sinuses to relieve stuffy nose and sinus pressure.

DayQuil is designed to provide temporary relief from symptoms of the common cold and flu during the day. It contains active ingredients that can cause wakefulness and may interfere with your sleep patterns if taken in the evening or at bedtime.

Common side effects of DayQuil include dizziness, nausea, and upset stomach. However, most people are able to take DayQuil without experiencing side effects. When they occur, most of DayQuil's side effects go away on their own or are easy to manage.