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Before You Buy NyQuil

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Updated September 17, 2013

NyQuil is a very popular medication used to treat cold and flu symptoms. Find out if it is right for you and your symptoms.

Active Ingredients (in each 15ml tablespoon):

Acetaminophen 500mg (pain reliever)
Dextromethorphan HBr 15mg (cough suppressant)
Doxylamine succinate 6.25mg (antihistamine)

Dosage:

Adults - Two tablespoons every 6 hours as needed for cold and flu symptoms. Do not take more than 4 doses in 24 hours.
Children - Ask a doctor.

Uses for Nyquil:

Temporary relief of cold and flu symptoms including:

  • Cough
  • Sore Throat
  • Headache
  • Minor Aches and Pain
  • Fever
  • Runny nose
  • Sneezing

Side Effects of Nyquil:

Drowsiness
Excitability, especially in children

Warnings:

  • Do not consume if you drink more than three alcoholic drinks a day. Acetaminophen can cause liver damage. Ask your doctor if you should take acetaminophen if you regularly drink more than three alcoholic drinks per day.
  • Do not use with other medications containing acetaminophen.
  • Do not use this medication if you are taking an MAOI (medication for depression, psychiatric, emotional conditions or Parkinson's disease) or for two weeks after stopping an MAOI.

Ask a Doctor Before Use:

  • If you have glaucoma
  • If you have a cough that produces a lot of mucous
  • If you have a breathing problem or chronic cough that is caused by asthma, smoking, chronic bronchitis or emphysema
  • If you have trouble urinating because of an enlarged prostate
  • If you are taking sedatives or tranquilizers
  • If you are pregnant or breastfeeding

Caution:

Stop use and ask doctor if:

  • Pain or cough worsens or lasts more than 7 days
  • Fever worsens or lasts more than 3 days
  • Redness or swelling is present in area causing pain
  • New symptoms occur
  • Cough returns or occurs with a rash or headache that won't go away

Other NyQuil Information:

Do not take this product when you have to operate machinery, drive a vehicle or perform other tasks that require alertness.
Nyquil is likely to make you very drowsy, be sure you can devote time to sleep before taking this product.

Sources:

"NyQuil Liquid." Vicks. 2006. Proctor & Gamble. 17 Nov 2006.

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