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You are here: Experts > Health/Fitness > Pharmacology > Pharmacy > pre-employment drug testing
Expert: Dr Alan Galbraith
Date: 2/3/2008
Subject: pre-employment drug testing
Question
After 23 years with the same company, I am changing jobs and going to work for a hospital. I will have drug testing and a TB skin test in one week. I take a number of medications and am worried one or more of them may cause a false-positive test result. Can you ease my fears?
I take these daily: Synthroid, Lisinopril, Clonidine, ginger, milk thistle, iron and calcium supplements, B-complex, Vitamin C, and a chewable multi-vitamin.
I am slowly weaning myself off Lexapro and Premarin, and am down to taking them twice a week.
I am also a Type 1 diabetic, and take Levemir and Novolog insulin daily.
As to the TB skin test, I had Histoplasmosis as a teen. Could this possibly cause a false-positive skin reaction?
Many thanks for even reading this far!
Answer
Dear Jennifer
Non of the drugs should pose any problem in a drug screen. I am not an expert on tuberculin tests but I believe false positives can be regular occurrences of which previous histoplasmosis can be one of them. I would try to check this with a clinical immunologist or microbiologist.
Regards
Dr Alan Galbraith
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