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Will Oxycodone And Methadone For Liver Cirrhosis Cause False Positive For Drug Test?

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Posted on Sat, 14 Jun 2014
Question: I suffer from liver cirrhosis and peripheral neropathy. These are the meds I am prescribed. Would any of these cause a false positive for marijuana at a drug screen.

Aldactone 100 mg 1 tab 3X a day
Lasix 40 mg 1, 3 X a day
Xifaxan 550 mg tabs 1 TB 2 X a day
Lactulose 15 ml Once Daily
Bupropion SR (Welbutrin)100 MG Tabs 2 every morning
Lyrica 200mg Cap      1 cap 3 X a day      
Oxycodone 15 mg      1 tab 3 X a day
Methadone 5mg 4 tab a day
Levorphanol 2MG Tab ½ - 1 daily               
Midodrine 5mg Tab 1 tab 2 X a day
Mirtazapine 7.5 mg Tab 1 daily – bedtime
Prozac 40 mg 1 X a day
Promethazine 12.5 mg tabs 1 tab 2 X a day as needed
Potassium 20 mg 1 X a day
Multi Vitamin 1 a day
doctor
Answered by Dr. Behar Greca (1 hour later)
Brief Answer:
Oxycodone and Methadone...

Detailed Answer:
Hi, thank you for posting.

I have gone through your query and I understand your concerns.

Oxycodone and Methadone will cause a false positive result for drug test.
Oxycodone and Methadone are synthetic opioid medicines and analogues of morphine and heroine.
Both these medicines are used to relieve severe pain.
As with other opioid medicines, tolerance and dependence usually develop with repeated doses.

Ask me for anything unclear.

All the best.
Dr. Behar.

Above answer was peer-reviewed by : Dr. Yogesh D
doctor
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Follow up: Dr. Behar Greca (2 hours later)
But I need to know, SPECIFICALLY, WILL THESE DRUGS CAUSE A FALSE POSITIVE FOR MARIJUANA? I have tested positive twice when I have not used the drug.
doctor
Answered by Dr. Behar Greca (11 hours later)
Brief Answer:
Promethazine...

Detailed Answer:
Thank you for writing back.

It is Promethazine the medicine that is causing the false positive result for marijuana drug test.
Promethazine causes false positive for THC(tetrahydrocannabinol). THC is the main component of the cannabis plant.
This is the reason why you have tested positive twice.

If you do not have any clarifications, you can close the discussion and rate the answer.

Wish you good health.
Dr. Behar.
Note: For further guidance on mental health, Click here.

Above answer was peer-reviewed by : Dr. Vaishalee Punj
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Answered by
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Dr. Behar Greca

General & Family Physician

Practicing since :1992

Answered : 621 Questions

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Will Oxycodone And Methadone For Liver Cirrhosis Cause False Positive For Drug Test?

Brief Answer: Oxycodone and Methadone... Detailed Answer: Hi, thank you for posting. I have gone through your query and I understand your concerns. Oxycodone and Methadone will cause a false positive result for drug test. Oxycodone and Methadone are synthetic opioid medicines and analogues of morphine and heroine. Both these medicines are used to relieve severe pain. As with other opioid medicines, tolerance and dependence usually develop with repeated doses. Ask me for anything unclear. All the best. Dr. Behar.