No, you can't. Dayquil contains acetaminophen, which is the active ingredient in Tylenol. Taking both at once can very easily cause liver failure, which can result in a coma or death. You also can't mix either of them with alcohol or other medicines containing acetaminophen, such as Vicodin.
Yes.
yes
You should not mix medications without your doctor's permsiion
yes
yes
Yes, i just did when i ran out of Advil. It works the Same as Tylenol with acetaminophen.
Yes
Yes
yes
no
yes
Yes u can