Anonymous wrote:I never take NyQuil for this reason, OP. It takes until evening for the grogginess to wear off. My husband takes it with no problem the next day, so it appears to be particular to the individual.
Maybe try a half dose next time, if you must.
PP here. FYI, if nasal congestion is the big concern, pseudoephedrine is very effective and doesn't disrupt my sleep. If you have a cough that is keeping you up, you might want your doctor to prescribe cough syrup with codeine. I have found that effective and doesn't leave me groggy the next day.