Fentanyl is a synthetic opioid related to the phenylpiperidines and is approximately 100 times more potent than morphine. This agent is highly lipid soluble and rapidly cross the blood-brain barrier. This is reflected in the half-life for equilibration between plasma and cerebrospinal fluid of approximately 5 minutes for fentanyl. The Fentanyl rapid test strip (urine) detects fentanyl through visual interpretation of color development on the strip. Drug conjugates are immobilized on the test region of the membrane. During testing, the specimen reacts with antibodies conjugated to colored particles and percolated on the sample pad. You can easily order Fentanyl Strips with our Drug Test Cups.