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What Prescription Drugs Can Cause a Positive Drug Test Result for Cocaine?

While you may be familiar with the illegal drug cocaine and some of its effects, what you may be less clear about is the fact that some prescription and over the counter drugs have similar qualities to cocaine and can bring up a positive drug test result for its use. What sort of drugs can produce this affect? One of the most prominent one is a drug used to treat cancer known as Brompton’s Mixture, a combination of cocaine and morphine that acts as a potent pain treatment. Some antibiotics, including amoxicillin and ampicillin have also been said to have this effect.

Among the over the counter drugs that have this affect are drugs that contain pseudoephedrine (as these drugs often require a signature to purchase due to their use for making meth, they could be considered a prescription drug) and some other prescription and over the counter preparations for cold and cough treatment. Dextromethorphan, a drug used for cough suppression can give a false positive for PCP; some over the counter weight loss preparations can give a false positive for amphetamines and Vicks inhalers can produce a false positive for methamphetamines.

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Though many of these can be ruled out by performing a gas chromatography or mass spectrometry test to verify the positive result (and many locations do perform this precaution), you would be advised to be quite clear on the use of any of these drugs when undergoing drug testing in the event that the location uses only the immunoassay test for their results. If the drug or topical anesthetic has a title that ends in caine or cain, there may be a very good chance that it can have this adverse effect on the drug test and so you should ask your doctor if there would be reason for concern. Some of the drugs used for eye drops in an ophthalmology office can also produce a false positive for instance.

Many negative results can occur if the drug testing you undergo uses only the immunoassay and a positive result occurs. This can mean anything from losing your job to being in legal trouble over the matter. If you are not sure if your medications contain ingredients that can produce these results, it is best to discuss it with your doctor.  Get a listing of the ingredients and any drug warnings associated with it so that you can inform the drug testing location in the event of a false positive and request a second drug test to verify the results. When you are asked to list any drugs you may be taking at the time of drug testing, it is wise to list anything you may be taking, whether they are everyday items such as a nutritional supplement or over the counter and prescription medications that you might not feel could give a positive result. The more open and honest you are about it, the more willing the testing will be to take your word on the matter.

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2 Responses to “What Prescription Drugs Can Cause a Positive Drug Test Result for Cocaine?”

  1. Glenn C. Collns says:

    My question will Triamcinolone crm .1% and the over counter medicine afin cause a negative effect on a urine cocaine test.

  2. Nice post! I have added your site to my favs. will be back again tomorrow hopefully for more great posts!

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Answers, comments, information, articles and opinions provided on all TestCountry related webpages are general information, and are not intended to substitute for informed professional medical, psychiatric, counseling, psychological, or other professional advice. You should not use the information on TestCountry for diagnosing or treating a health problem or disease, or prescribing any medication or other treatment. You should always speak with your physician or other healthcare professional before taking any medication or nutritional, herbal or homeopathic supplement, rehabilitation or detoxification from any substance abuse or adopting any treatment for a health or drug problem.

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