TN Scientific Fentanyl/Xylazine (FYL/XYL) Combo Test Strips are reliable and accurate forensic tools designed to detect both fentanyl and xylazine using a single strip. Ideal for harm reduction professionals, researchers, and personal safety use, each kit includes a built-in fill line and an all-in-one pouch—no extra tools or containers required. These dual-detection strips offer verified sensitivity to a wide range of fentanyl analogs, xylazine mixtures, and combinations, delivering clear, fast results in minutes. Trusted by government agencies, universities, and harm reduction organizations nationwide.