You can use both Dayquil Cold and Flu Relief Liquid and NyQuil Cold and Flu Nighttime Relief Liquid on the same day but DO NOT take them at the same time. Taking both products at the same time can lead to liver damage due to an excessive dose of acetaminophen (also known as Tylenol),...
What do I do if I miss a dose? If you take Vicks DayQuil Multi-Symptom Cold/Flu Relief (acetaminophen, dextromethorphan, and phenylephrine capsules and tablets) on a regular basis, take a missed dose as soon as you think about it. If it is close to the time for your next dose, ...
2. Avoid Taking Dayquil With Food. The best time to take Dayquil is when you’re not eating anything because your body can absorb the drug more easily if you’re not swallowing anything at the same time. If you do eat or drink something while taking Dayquil, it can potentially reduce it...