NyQuil

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• fever reducer
  )
• Dextromethorphan (30 mg/30 mL) (cough suppressant)
• Doxylamine succinate
  (12.5 mg/30 mL) (antihistamine/hypnotic)
• Alcohol (10% by volume)

The LiquiCap capsule version has the following active ingredients per pill, half the recommended adult dose:

• Acetaminophen
  (325 mg/pill) (pain reliever/fever reducer)
• Dextromethorphan (15 mg/pill) (cough suppressant)
• Doxylamine succinate
  (6.25 mg/pill) (antihistamine/hypnotic)

The liquid version of NyQuil SEVERE Cold/Flu Multi-symptom Relief,^[3] available in syrup and LiquidCap form. The recommended adult dose contains:

• fever reducer
  )
• Dextromethorphan (20 mg/30 mL) (cough suppressant)
• Doxylamine succinate
  (12.5 mg/30 mL) (antihistamine/hypnotic)
• Phenylephrine (10 mg/30 mL) (nasal decongestant)
• Alcohol (10% by volume)

The LiquiCap capsule version has the following active ingredients per pill, half the recommended adult dose:

• Acetaminophen
  (325 mg/pill) (pain reliever/fever reducer)
• Dextromethorphan (15 mg/pill) (cough suppressant)
• Doxylamine succinate
  (6.25 mg/pill) (antihistamine/hypnotic)
• Phenylephrine (5 mg/pill) (nasal decongestant)

NyQuil D

NyQuil D contains pseudoephedrine, a decongestant that in some regions (such as the United States) is now placed behind the counters at pharmacy and other retail stores and must be requested by the customer. It contains the following active ingredients (15 mL is one tablespoon, half the recommended adult dose):

• Acetaminophen
  (500 mg/15 mL) (pain reliever/fever reducer)
• Dextromethorphan (15 mg/15 mL) (cough suppressant)
• Doxylamine succinate
  (6.25 mg/15 mL) (antihistamine/hypnotic)
• Pseudoephedrine (30 mg/15 mL) (nasal decongestant)

NyQuil Cough

Nyquil Cough contains a cough suppressant and antihistamine but no painkiller. Its active ingredients are:

• Dextromethorphan (15 mg/15 mL) (cough suppressant)
• Doxylamine succinate
  (6.25 mg/15 mL) (antihistamine/hypnotic)

NyQuil Sinus

Nyquil Sinus's active ingredients are:

• Acetaminophen
  (pain reliever/fever reducer)
• Doxylamine succinate
  (antihistamine/hypnotic)
• Phenylephrine (nasal decongestant)

Nyquil Sinus is available as LiquiCaps only.

ZzzQuil

• Diphenhydramine HCl
  50 mg (antihistamine)

Children's NyQuil

Children's NyQuil is artificially flavored for easier consumption by children and contains no alcohol.^[4] It is available in the syrup form only. Its active ingredients are:

• Chlorpheniramine
  (antihistamine)

Reformulation

Until 2006, NyQuil Cold/Flu Multisymptom Relief and NyQuil Sinus contained

Vicks chose to reformulate NyQuil Sinus in 2006, replacing pseudoephedrine with phenylephrine. However, studies have shown that phenylephrine is no more effective than a placebo.^[5] As of 2012, the only NyQuil variety which contains pseudoephedrine is Nyquil D.^[6]

References

External links

• Vicks.com