The quick answer is no. Sudafed is a decongestant and Dayquil contains a decongestant. They work by constricting blood vessels (thus shrinking/tightening the tissue in your sinuses/nose. But, they have the effect on your whole body. Too much can cause elevated blood pressure, rapid heartbeat, nervousness, shakiness, and can be very serious. It can be complicated if you are on any other medications that interact. If you did take the recommended dose of Dayquil and later wanted to take Sudafed (you ran out of Dayquil for example) I would wait at least 6 hours to take a recommended dose of Sudafed.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Posted 25 Jan 2010 • 2 answers
Posted 26 Jan 2013 • 2 answers
Posted 15 Feb 2013 • 1 answer
Sudafed 24-Hour - How long after taking a regular (2 30mg) dose of 30mg sudafed can I take a dose of
Posted 26 Mar 2013 • 1 answer
Posted 21 Oct 2015 • 0 answers