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My client is taking co-proxamol (propoxyphene), why is the opiate test always negative?

April 26, 2017client co-proxamol negative opiate Propoxyphene taking Test

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My client is taking co-proxamol (propoxyphene), why is the opiate test always negative?

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A. The opiate test looks for opiate compounds that are in some way related to morphine and codeine. Propoxyphene, although an opiate and used in a similar way to other analgesics is significantly different to the compounds that the opiate test will detect and so will not produce a positive result. Altrix will offer a specific screening test for propoxyphene in 2005.