Proteins, nucleic acids are best example of natural polymers. Similarly cellulose is also a natural polymer which acts as main structural component of plants. Usually natural polymers are composed by condensation polymerisation with the elimination of water molecule.
Drug-Laboratory Test Interactions. False-positive urine immunoassay screening tests for phencyclidine (PCP) and amphetamine have been reported in patients taking venlafaxine. This is due to lack of specificity of the screening tests. False positive test results may be expected for several days following discontinuation of venlafaxine therapy. Confirmatory tests, such as GC/MS will clear that misconception up asap...or if you are not using pcp and your dr is sceptical.
I had a urine test and tested positive for methadone and I do not take methadone. Is there any medications that can cause a false positive? Can dilitiazem cause false positive for methadone urine tests? Can benydryl cause false positive for methadone in a urine drug screen? Does methadone show up on a standard urine drug test? Do I have to take 2 urine tests one is a methadone and the other a drug panel if the dr didn't discuss them to me?