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What causes false positive test results for cocaine?

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Posted on Wed, 11 May 2016
Question: I recently tested positive for cocaine metabolites, but I have never used drugs. Is it possible I received any form of cocaine (anesthetic) when I had a tooth extracted? Would the anesthetic used by the dentist even be kept on file?
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Answered by Dr. Alexander H. Sheppe (9 minutes later)
Brief Answer:
Consultation

Detailed Answer:
Hello, and thanks for your question.

A false positive for cocaine could be caused by a couple things. First, antibiotics such as amoxicillin or ampicillin, sometimes administered during oral surgery, could do it. So could some topical anesthetics derived from cocaine. But more likely it was a laboratory error. This information legally must be kept on file as part of your medical record. If the dentist doesn't keep a medical record, you have the right to XXXXXXX him.

Please remember to rate and close this answer thread when you are finished and satisfied.

In the future, for continuity of care, I encourage you to contact me directly at my private link below. After you ask a direct question, it would be my pleasure to be your dedicated personal physician on this website. My name is Dr. Sheppe, and I am an XXXXXXX doctor working in New York City at NewYork-Presbyterian Hospital, ranked #1 for Psychiatry in the United States (tinyurl.com/psyrank). For a personalized comprehensive evaluation, treatment recommendations, and individual therapy, ask me at HealthCareMagic at this private link: tinyurl.com/DrSheppeAnswers


Above answer was peer-reviewed by : Dr. Arnab Banerjee
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Dr. Alexander H. Sheppe

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Practicing since :2014

Answered : 2240 Questions

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What causes false positive test results for cocaine?

Brief Answer: Consultation Detailed Answer: Hello, and thanks for your question. A false positive for cocaine could be caused by a couple things. First, antibiotics such as amoxicillin or ampicillin, sometimes administered during oral surgery, could do it. So could some topical anesthetics derived from cocaine. But more likely it was a laboratory error. This information legally must be kept on file as part of your medical record. If the dentist doesn't keep a medical record, you have the right to XXXXXXX him. Please remember to rate and close this answer thread when you are finished and satisfied. In the future, for continuity of care, I encourage you to contact me directly at my private link below. After you ask a direct question, it would be my pleasure to be your dedicated personal physician on this website. My name is Dr. Sheppe, and I am an XXXXXXX doctor working in New York City at NewYork-Presbyterian Hospital, ranked #1 for Psychiatry in the United States (tinyurl.com/psyrank). For a personalized comprehensive evaluation, treatment recommendations, and individual therapy, ask me at HealthCareMagic at this private link: tinyurl.com/DrSheppeAnswers