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How long does opioid remain in the system for a urine test?

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Posted on Wed, 18 May 2016
Question: On MS Contin from pain mgmt. Began drinking, went to detox (doc cant know), . Friday 8am,they gave me 20mg, sat-15mg, sun -10mg, mon-5mg...Now I was asked to give a urine sample for my pain doc this morning between 8-8:30am. Will they detect it?....If I tell him about the alcohol (which I'm off of now), he'll throw me out, and theres nowhere else to go. Been on pain meds for 18 yrs. What should I do? Drank a lot of cranberry juice yesterday and urinated as much as possible.
doctor
Answered by Dr. Chintan Solanki (2 hours later)
Brief Answer:
likely result will come negative for opioids

Detailed Answer:
Hello,

Thanks for writing to us. I can understand your concern.

Opioids can be detected maximum up to 100 hours in urine test after last intake. Your last intake was on Monday 5 mg. You are going to give sample on Friday and you have tried lots of drinking. Alcohol intake has nothing to do with urine screening test for opioid. Considering all these aspects result will likely come negative. However laboratory may check for dilution of urine and can suspect something and that totally depends on lab.

All the best.

Hope I have answered your query, I will be happy to help further.
Regards,
Dr.Chintan Solanki.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Chintan Solanki (23 minutes later)
The test was this morning. I'm supposed to be on opiods. Just wondering if they'll also specifically test for methadone. (I'm not drinking alcohol anymore. Its been 7 days sober. If they test for methadone also is what I'm concerned about. This doctor cant know I drank alcohol. Even though it was an isolated incident, i'm not an alcoholic, but was drinking for a month due to divorce and other things. Now I'm stayin sober. Just worried bout the methadone test. If I had 20mg, last fri, 15 on sat, 10 on sun, 5 on Monday, how many mg will they find in my urine after 72 hours?...(Today)
doctor
Answered by Dr. Chintan Solanki (4 minutes later)
Brief Answer:
then you may pass or may not

Detailed Answer:
Hi,

Thanks for follow up and clarification. Methdaone is an opioid and there is no separate test for methadone. Duration of 72 hours is inconclusive. As you have drunk enough fluids, more possibility of negative test is there rather than positive. And urine screening detects absence or presence, not quantity of drugs.

Feel free to discuss further.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Chintan Solanki (23 minutes later)
I read since methadone is a synthetic opiod, they must test specifically for that. SO , youre saying, since I'm supposed to be on MS Contin, it'll just come up positive for opiods and ill be OK?...Are you sure bout that. I read theres different types of urine testing, and some are simple 5 panel tests, then theres a gas chromography test or something.....


For example, I'm looking at the toxicology results from the detox. Under Morphine it says: 1240.0 NG/ML (0.0-4.9 NG/ML)...Isnt that measuring the amounts?


On the list above opiate is Methadone/EDDP-U Negative NG/ML (<=1000 NG/ML).
Of course when this test going into the detox was taken there was no methadone in my system...SO maybe they do test specifically for that too...
doctor
Answered by Dr. Chintan Solanki (3 hours later)
Brief Answer:
in screening specific drug is not identified

Detailed Answer:
Hi,

Thanks for good questions.

There are two main categories of urine drug testing – screening followed by confirmation. Screening tests are initial, qualitative drug tests conducted to identify classes of drugs present in the urine and typically are done using immunoassay. They rely on a set threshold above which a positive result is produced and therefore do not detect lower concentrations of a drug. Confirmatory tests are used for further analysis of a sample – to confirm a positive or sometimes, negative, result and typically are done using gas chromatography/mass spectometry (GC/MS) or high performance liquid chromatography (HPLC). Confirmatory testing can identify a specific drug. If the goal is to detect a synthetic or semisynthetic opioid, this testing should be used as immunoassays do not typically detect these opioids.

Results you mentioned "1240.0 NG/ML (0.0-4.9 NG/ML)" is suggesting level of drug in urine. From this we cannot say that how much drug person has taken as many of the metabolic, genetic and physiological factors play role in metabolism of the drug.

So your results will totally depend on which technique your laboratory has used and how they proceed.

For more information I suggest reading from following link:

http://www.legis.state.ak.us/basis/get_documents.asp?session=28&docid=24571

Hope this answer will help you in understanding screening process.

Take care and all the best.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Chintan Solanki

Psychiatrist

Practicing since :2007

Answered : 2406 Questions

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How long does opioid remain in the system for a urine test?

Brief Answer: likely result will come negative for opioids Detailed Answer: Hello, Thanks for writing to us. I can understand your concern. Opioids can be detected maximum up to 100 hours in urine test after last intake. Your last intake was on Monday 5 mg. You are going to give sample on Friday and you have tried lots of drinking. Alcohol intake has nothing to do with urine screening test for opioid. Considering all these aspects result will likely come negative. However laboratory may check for dilution of urine and can suspect something and that totally depends on lab. All the best. Hope I have answered your query, I will be happy to help further. Regards, Dr.Chintan Solanki.