In our latest question and also answer, the pharmacist discusses combining doses of NyQuil and also DayQuil because that use before bedtime.

You are watching: What happens if you mix dayquil and nyquil



Amanda asked

NyQuil knocks me out and also I mean way out! I often tend to sleep with multiple alarms in the morning, etc. In an initiative to mitigate some of the sleepiness, is it safe to take 15 ml the NyQuil and 15 ml of DayQuil in ~ bedtime instead of a full 30 ml dose of NyQuil? say thanks to you!


Both NyQuil and DayQuil share usual ingredients so caution is advised once combining doses (to protect against overdose). However, one-half doses of eachwould be thought about safe as you aren"t going over the maximum dose of any ingredients.You simply need come be careful to measure doses of each accurately.

DayQuil contains the adhering to ingredients:

Acetaminophen (pain reliever)Dextromethorphan (cough suppressant)Phenylephrine (nasal decongestant)


NyQuil consists of the adhering to ingredients:

Acetaminophen (analgesic)Dextromethorphan (cough suppressant)Doxylamine (sedating antihistamine)


As watched above, both products contain acetaminophen and also dextromethorphan. Complete doses that NyQuil and also DayQuil need to not be taken together to protect against the additive doses of ingredients shared in both products.

Below, space the main differences in between DayQuil and also NyQuil:

Phenylephrine (contained in DayQuil however not NyQuil)Doxylamine (contained in NyQuil however not DayQuil)Alcohol (NyQuil contains 10%, DayQuil is alcohol free)

Phenylephrine is the sleep decongestant had in DayQuil. That is notcontained in NyQuil together it can cause insomnia or alertness in part individuals. Doxylamine is the antihistamine in NyQuil. That is included for it"s sedative effect.

See more: What Is 3 Is 20 Percent Of What Number Is 3? Solved: 3 Is 20 Percent Of What Number = 15

Combining DayQuil & NyQuil because that Nighttime Use

While girlfriend could absolutely combine DayQuil and NyQuil before bedtime (at appropriate dosages), it might not it is in as reliable for sleep together NyQuil alone because DayQuil includes phenylephrine (nasal decongestant) and also can reason insomnia in some people.

However, taking one-half doseof each will certainly not an outcome in too high of a sheep of any single ingredient.It is vital to not take a complete dose (30 ml) that each as this will result in a potential overdose the ingredients.

Taking half-doses (15 ml) that DayQuil and NyQuil will an outcome in the complying with doses of each ingredient:

625 mg (325 mg native each)Dextromethorphan 25 mg (15 mg from NyQuil, 10 mg native DayQuil)Phenylephrine 5 mg (from DayQuil)Doxylamine 6.25 mg (From NyQuil)

All the above doses room within the variety of one acceptable solitary dose of every ingredient.