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Fig. 1 | Harm Reduction Journal

Fig. 1

From: Point-of-care community drug checking technologies: an insider look at the scientific principles and practical considerations

Fig. 1

a Schematic of a competitive lateral flow immunnoassay dipstick, b Example of a fentanyl test strip where the both test and control line appears red, indicating a negative result, and c example of a fentanyl test strip where the control line appears red and test line is absent (inhibited), indicating a positive result due to fentanyl binding the labeled antibodies and preventing their interaction with the test line

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Harm Reduction Journal

ISSN: 1477-7517