It depends on the patient, the strength of the medication, how long you've been taking them, and your overall dependence/tolerance level. Generally, the longer you've been taking it and the higher the dose, the stronger the withdrawals are. How long they last is different for each person, but regardless you should never stop and do it cold turkey. Aside from the extreme pain and discomfort, you risk other problems and serious injury to yourself if you're not being supervised or monitored through the process.
The easiest way is to use a system of Incremental Dose Reduction. While I've written about it many times here on WA, I posted a How To on E-How last month that has the step-by-step procedure you can follow that will help you.
If you don't want to do it that way, you can always ask your doctor for withdrawal drugs like Suboxone. The problem with those though, is that it's just another drug you'll eventually need to stop taking as well. IDR gets you to the point where you can stop taking them altogether.
You can see the procedure here: http://www.ehow.com/how_4722205_reduce-opiate-dosage-minimum-withdrawal.html
It really depends on how long you are taking the drug and what strength you are taking. If you are a regular user of Oxycontin 40 mgs. say 2-3 a day, for several months, withdrawl can be for several weeks, it will be like having the flux10 with weakness, chills and hot sweats, diarrhea, nausea and severe vomitting. TRy to find a Doctor Who is able to prescribe suboxone. you will be able to wean off the narcotic with this medicine with minimal discomfort the only problem is not all doctors are certified to prescibe this drug and it can cost 7-10 for one pill without insurance. Good luck. Best to limit your use of Oxycontin so you don't get the chip, Jones or habit!
about a day to clear completely
It depends on how many mg's of hydrocodone are in the pill.
lortab 5 lortab 7.5 and lortab10
123 days.
I had 25 lortabs illegally and i got a class 2 misdemeanor in the state of Utah so certain areas you can have many.
27 through 89 days
29.5 days
548 days.
80 days.
106 days, including both days.
There are slight variations through a year. The average is 29.531 days.
548 days.
233 days.