Could someone please tell me how long hydrocodone stays in your system ?

For the purposes of drug testing, it depends on the amount of hydrocodone taken, the amount of time it was taken, an individual's metabolism, and weight, as long as any other medications taken concurrently.

With that in mind, it will typically clear a Urine sample within 7-10 days, however a hair sample could be on the order of months.

If you are asking for the half life of the medication, it will typically clear the body in 1 to 3 days.