A Breath Test for Opioids (IMAGE) University of California - Davis Caption A test to detect opioid drugs in exhaled breath has been developed by engineers and physicians at the UC Davis. In this photo, a volunteer breathes normally into the human breath sampler. Samples are frozen before being taken to the lab for analysis. Credit Cristina Davis, UC Davis Usage Restrictions May be used with acknowledgement. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.