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Depends on the medication and how it's administered. Inhaled into the lungs or the nasal mucus membranes, some medications can start to become effective in seconds. Taken orally, times range from roughly 20 to 45 minutes. After 75 minutes you should be experiencing relief.

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12y ago
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13y ago

it takes anywhere from 20 minutes to an hour

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17y ago

Usually 8-12 hours, but you could feel drowsy up to 24 hours. It should say on the container.

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9y ago

NyQuil is composed of alcohol and water. Thus, it is absorbed quickly. It leaves the digestive tract and enters the blood stream in about thirty minutes.

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12y ago

I'll let you know, i just took some because of this cold i got

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9y ago

Nyquil does not control the amount of time you sleep while taking it. If you are not feeling well, you may sleep longer than usual.

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Q: How long does it take Sudafed to work?
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Can you take Sudafed and aspirin on the same day?

It all depends on the main ingredient in the Sudafed you are purchasing. The regular Sudafed which contains pseudoephdrine is safe to take with Dayquil. The Sudafed PE, which is now being sold can not be taken with Dayquil since Dayquil contains the same decongestant, phenylephrine as Sudafed PE.


Can you take Sudafed with grapefruit?

Yes. You can take them together.


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You don't. Its illegal. Take Sudafed for your cold and make some chicken soup.


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What is the easiest way to get uncongested?

Take a Sudafed, blow your nose for a long time, or go get and learn how to use a neti pot.


What is the difference between Sudafed and Sudafed pe?

The difference between Sudafed and Sudafed PE is that Sudafed contains pseudoephedrine and Sudafed PE contains phenylephrine. While phenylephrine doesn't work quite as well as a decongestant, it is the most common decongestant ingredient in cold and sinus formulations, due to the fact that people were using pseudoephedrine to make the illegal drug methamphetamine.