25th November 2019


How much DayQuil can I take in a day?

A: If you are taking DayQuil SEVERE Caplets, you can take two caplets with water every four hours. If you are taking DayQuil SEVERE Liquid, you can take 30 mL every four hours. Do not take more than 4 doses in 24 hours.

How long do the effects of Nyquil last?

While the average dose of Nyquil lasts an average of 4-6 hours, doxylamine can have a slightly wider range of effect. Depending on the person, it can last anywhere from 3 to 8 hours, making it an ideal choice as a night time sedative.

What are the side effects of taking DayQuil?

Common side effects may include:
  • dizziness, weakness;
  • mild headache;
  • mild nausea, diarrhea, upset stomach;
  • dry mouth, nose, or throat;
  • feeling nervous, restless, irritable, or anxious; or.
  • sleep problems (insomnia).
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