Norco, which contains hydrocodone and acetaminophen, typically stays in your system for about 20 hours to be mostly eliminated, based on its half-life of approximately 4 hours. However, detection times vary depending on the testing method:
- Urine: Hydrocodone from Norco can be detected for up to 3 to 4 days after the last dose.
- Blood: Norco can be detected in blood for about 9 hours to 24 hours after use.
- Saliva: Detectable up to 2 days after the last dose.
- Hair: Can be detected for up to 90 days after use.
The duration Norco stays in your system depends on factors such as dosage, frequency of use, age, liver function, other medications, and individual metabolism
. In summary, while the pain-relieving effects of Norco last about 4–6 hours, traces of hydrocodone can be detected in the body for several days, especially in urine and hair tests
