DayQuil: uses, dosage, side effects, and composition


DayQuil is an over-the-counter medication used to relieve symptoms associated with cold, flu, and allergies.

Being an over the counter drug, you can easily buy it from medicine stores without a prescription from a doctor.

The medication contains a combination of active ingredients that work together to alleviate symptoms such as nasal congestion, cough, fever, headache, and body aches.

DayQuil comes in different dosage forms and strengths. These include Capsules, syrup, and tablets.

This means that we have DayQuil capsules, DayQuil syrup, DayQuil tablets etc

In this article, we will discuss the uses, dosage, composition, side effects, and frequently asked questions about DayQuil.

Uses of DayQuil

DayQuil, regardless of its dosage form, strength, or variant, is used to relieve symptoms associated with cold, flu, and allergies.

Commonly available variants include DayQuil cold and flu, DayQuil severe, etc.

It help to alleviate discomfort caused by these symptoms, making it easier to perform daily tasks without feeling sluggish or tired.

Dosage of DayQuil

The dosage of Dayquil varies depending on the age and weight of the patient.

It also depends on the variant, and its strength.

The general recommended dosage is 2 capsules every 4-6 hours, but it is advised to read the leaflet and follow the instructions provided by your healthcare provider, so as not to exceed the required dosage as it can lead to unwanted side effects.


Dayquil contains a combination of active ingredients which are Acetaminophen, Dextromethorphan, and Phenylephrine.

The strengths of the active ingredients depend on the variant in question.

Acetaminophen which is commonly known as paracetamol is a pain reliever and fever reducer.

Dextromethorphan is a cough suppressant, while Phenylephrine is a decongestant.

DayQuil also contains several inactive ingredients or excipients such as microcrystalline cellulose, croscarmellose sodium, magnesium stearate, and silicon dioxide.

Side effects of DayQuil

Like any other medication, DayQuil can cause side effects when taken.

Some of these include nausea, vomiting, stomach pain, dizziness, drowsiness, and headache.

In rare situations, DayQuil can cause more severe side effects such as liver damage, allergic reactions, or high blood pressure.

If you experience any severe side effect, it is advised to discontinue the usage of the drug and seek immediate medical attention.

DayQuil Frequently Asked Questions

#1. How Quickly Does DayQuil Work?

The speed at which DayQuil works differs, depending on the individual and their specific symptoms.

Most individuals start to feel some relief from their symptoms within 30 minutes to an hour of taking the medication.

However, symptoms such as nasal congestion or cough may take time to improve.

It is important to note that DayQuil is not a cure for cold or flu but rather a medication that helps to alleviate their symptoms.

Can DayQuil be Taken on an Empty Stomach?

DayQuil capsules do not pose any harm when taken on an empty stomach, but it is advised to take it with food or after eating to reduce the risk of stomach upset or nausea.

Taking DayQuil with food can also help the medication to be absorbed more effectively and provide better relief from symptoms.

Does DayQuil Get Rid Of Running Nose And Sore Throat?

DayQuil is best at alleviating symptoms associated with a running nose and sore throat, but it is not a cure for these conditions.

DayQuil contains a combination of active ingredients that work together to relieve symptoms such as congestion, cough, headache, fever, and body aches.

The decongestant in Dayquil can help nasal congestion and may alleviate a running nose.

Although it may not completely eliminate these symptoms, so additional treatment or medication may be necessary.

As for sore throat, DayQuil may provide some relief by reducing pain and inflammation by the help of paracetamol in it.

However, if sore throat persists, it is advised to seek medical attention to determine the underlying cause and receive proper treatment for it.


In conclusion, DayQuil is a widely used medication for the relief of symptoms associated with cold, flu, and allergies.

It is important to note that every individual must seek the evaluation of a professional health provider for further evaluations and treatment if any symptoms you are taking DayQuil capsules for persist or worsen.

Additionally, it is advised to read the leaflet and follow the instructions provided by your doctor or pharmacist.

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