A review of the advantages and disadvantages of specimens is available. An absorbent collection device is placed in the mouth and the saliva collected is screened for drugs of abuse. What is the turnaround time? As discussed later the pharmacokinetic characteristics of drugs are more closely aligned to blood concentrations than, for example, urine or hair. Testing is usually performed by employers, for either pre-employment, random, post-accident, reasonable suspicion, or return-to-duty testing.
A number of other drugs of forensic interest have been measured in oral fluid.
Oral Fluid Testing FAQs
Chew gum or breath mints. Eur J Clin Pharmacol. Up to 2 to 4 days. These data show that the pharmacokinetics of drugs in oral fluid is more complex than that of blood. I have ranted before about how many types of tests unfairly target marijuana smokers so I will not get into that.