Norco is a synthetic opiate. It will stay in your system for a few days on average. Since you asked the question 5 days ago, if you haven't taken any since then, you should be fine. If you're taking it for the high then you'll have no excuse if you test dirty. If you take it per a doctors' order and have a prescription bottle, take it with you and make the phlebotomist or other tester document it. They can't fire you or not hire you if you can prove you are under a doctors' care. Just a friendly caution: Please be careful as norco is addictive. If you are taking it legitimately for pain, use it right and when you don't need it any longer flush any extra down the toilet. Out of sight, out of mind.