What is the expert answer for how long vicodin stay in your system?

There really isn't an expert answer for that question... it's kind of like asking, "How long does it take a person to digest a meal?"

... well, it depends on the person. How old are they, how big are they, how fast is their metabolism? How much food/liquids are they taking in? How often are they using the restroom? What kind of food/liquids are they taking in? How often have they previously used vicodin? Are they in their perfect health? Are they on any other medication? How much vicodin did they take this time?

... see what I mean?

USUALLY, hydrocodone stays in your system for approximately a week... give it 2 weeks to be absolutely sure.. . hope that helped somehow.

Google it and you will find the right answer.