http://2learnhow.com/story.php?title=lochness-medical-rapid-response-fentanyl-test-strips It's easy to use and doesn't cost much to get the Rapid ResponseTM Fentanyl Test Strip (Liquid/Powder). It is a quick and accurate screening test that can find fentanyl at levels above 200 ng/mL. This drug test can give you correct and quick results in as little as one minute. Only for use in forensics. Not an IVD. Mon, 18 Nov 2024 04:06:25 UTC en