Negative: Two red lines are visible, one in the test region (T) and another one in the control region (C). No matter the color intensity of the test line is weaker or stronger than that of the control line, the test result is negative.
Positive: Only one red line visible in the control region (C) and the absence of the test line indicates a positive result.
NOTICE: A very faint line in the test region indicates that the amphetamine in the specimen is near the cut-off level of the test. These specimens should be retested or confirmed with a more specific method before a positive determination is made.
Invalid: The test is invalid if the control line is not visible regardless of the presence or absence of the test line.