Question: nyquil how long does it take to kick in?
Answer: A: If you are taking NyQuil LiquiCaps, you can take two LiquiCaps with water every six hours. If you are taking NyQuil Liquid, you can take 30 ml every six hours. Q: How long does it take for NyQuil to work? A: This depends on many factors but it usually takes 30 minutes for NyQuil to start working.