How Long Does Nyquil last

How Long Does Nyquil Last: A Brief Guide

You must have used Vicks to get rid of many problems like cold, cough, etc, under this brand only a popular over-the-counter medication is available in the market which can be used to treat a lot of problems.

Nyquil is a medication that can be used to treat symptoms like the common cold, various types of allergies and influenza. It contains drugs like dextromethorphan, chlorpheniramine and many other components. It can be used to have a proper sleep as it is responsible for providing a better sleep without any disturbances.

You can find it as a very effective medicine that helps you to treat the common cold, cough, allergy, sore throat, etc but just like almost every other medicine it also comes with its own side effects. But now the question is how long does the Nyquil last?

Well, the answer to this question can vary from person to person depending upon his age, body mass, metabolism, the quantity of medicine taken, etc. But mostly the effects can last up to 8 hours or in some cases more than 8 hours also. But one can get rid of the sleepiness effect in 4 to 6 hours, this can also vary too. But the hangover will hit you, that is why it is advised to sleep enough after the dosage. Since it is made of various other components so to completely remove its effects from the body the time varies for every component.

Does Nyquil make you sleepy?

Many people use Nyquil as a sleep aid and there are components present in it that can help you to get better sleep. So, yes it is true that it can make you sleepy. This dose of medicine contains components that can make you drowsy and tired. In simple words, there are chemicals present in the medicine which are responsible to make you feel sleepy. One of the components is named as Doxylamine succinate which is specially responsible for maintaining effective sleep in case you are suffering from any disease. It is also advised to take it before going to sleep in the night in order to get a perfect sleep without any interruption.

How long does Nyquil take to work?

The time for Nyquil to start working is not fixed for every individual but it usually takes between 10 to 15 to kick in. The medicine exists in the form of pill and liquid. You will feel a kind of sensation in your throat after the liquid dose. In some people, it can take up to 30 minutes also to show its effects. It can make you feel dizzy and sleep. After the dosage, your ache will fade away and your eyelids will feel heavy. Therefore, it is usually taken before going to sleep.

Nyquil side effects

As already said, this medicine also comes with its own side effect just like any other. Some of the common side effects that you can face after the usage of the medicine are as follows:

  • You can experience a feeling of dizziness in which you would be uncomfortable in maintaining your balance.
  • Anxiety can hit you hard after the dosage.
  • Some people also vomit after the intake of medicine.
  • Nausea is another symptom which you experience.
  • You would feel drowsy and sleepy and would like to sleep after the dosage.
  • You would also feel weak and would not like to do any type of work.
  • A hangover can also hit you hard after you woke up from the sleep.
  • You would not feel hungry and the craving for food would not be there after the dosage.
  • Diarrhoea is another symptom which many people have experienced.
  • You can experience a kind of excitability after the intake of dosage.
  • Pain in the stomach can also be there. 
  • You would feel exhausted and tired so much.
  • Sore throat is also a symptom which can be seen after the intake of the medicine
  • Some people also feel nervous and stressful during that period of time.

How long does Nyquil take to kick in?

The answer to how long does Nyquil take to kick in can depend on various factors. In most of the people, the medicine can start to kick in after the 10 to 15 minutes of the dosage. In some cases, it may take 30 to 45 minutes also before they fall asleep.

You can feel some immediate effects also. Like your pain will start fading out and you will feel drowsy. The liquid form of the medicine can cause a warm sensation in your throat immediately. If you are taking it in the daytime then it is advised to stay in your home only as it can kick in anytime after the dosage and you will feel tired and will like to sleep.

Does Nyquil work?

Nyquil really works to treat the common cold, cough, allergy, etc. It is one of the most popular over-the-counter medicines available in the market. The components present in it can also help you to fall asleep without any interruption when you are ill or are unable to sleep. It is usually taken in the night before going to bed as it contains the chemicals that help you to get proper sleep.

It can also work in dealing with symptoms like sore throat, watery eyes, sneezing, minor aches and pains, body aches, headache, runny nose, cough, flu, and fever. Since every dose counts so it is advised to take it properly and not make it a habit.

Is Nyquil safe?

Nyquil is a popular over-the-counter medicine mostly used to treat cold, cough, etc but one should be well aware of side-effects also. It is available in the pharmacies in the form of pills and liquid and too without any prescription. This is because it is safe to use if you are not depending on it too much. But if not taken correctly it can cause you a lot of health problems and can become an addiction also. It can make you fall asleep very easily every night but it is advised not to depend on it as it can cause a lot of problems later. This medicine helps people to fall asleep when they are sick or are unable to sleep but taking it regularly can be harmful to them. Also, it is advised not to take if you are suffering from any kind of disease or allergy.

Does Nyquil help you sleep?

It has been scientifically proved that the various components present in medicine are specially responsible to induce sleep. So it is true that it can help you to sleep without any disturbance. It is used as a sleeping aid by many people and it can make you fall asleep for 4 to 6 hours mostly. It can also vary from person to person, lasting up to 7 to 8 hours. Many people take it to have a proper sleep without any disturbance but it is advised not to depend on this as it also comes with a lot of side effects. Many doctors do not advise it as a means to fall asleep because of the health problems it can cause later.

Does Nyquil knock you out?

Nyquil is mostly taken before going to sleep when you are suffering from the common cold or you are ill and are unable to sleep. This dose of medicine can really help you to get some relief from the symptoms. The components present in it are also responsible to make you feel dizzy, tired and sleepy. It is also advised to sleep enough after the dosage so that the medicine can be out of your body when you wake up. The hangover can hit you and can make you feel dizzy and drowsy in the morning. 


The conclusion comes is that Nyquil is safe if taken properly. It can help you to get rid of symptoms like cold, cough, allergy, sore throat, etc but it also comes with side effects. It can make you fall asleep also but is advised not to take it as a means to fall asleep easily. 

There can be various side effects and not taking it properly can cause a lot of health problems. Therefore, it is taken not to intake it if not required. You can take it without any prescription from any pharmacy but it is important not to depend on it too much.

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