What does a faint line on a drug test mean?

How do I read a faint line on a drug test kit

This is a common question and one that can cause a lot of confusion and anxiety

On the picture above, you can see a drug test result using a saliva drug test which has tested for 4 drugs: COC Cocaine, AMP Amphetamine, OPI opiates, and THC Cannabis. The C is the control line to show that the drug test membrane has absorbed enough saliva to run the test.

You can see on this test kit that the lines vary in intensity but that there is a test line present for each drug. The THC and the OPI lines are fainter than the others in this particular test.

All of these drug test results including the faint lines are negative ie no drug was detected

The THC line on the test strip on the bottom left of the photo is very faint in this case, but this is still a negative result. The faintness of the THC test line is of no significance and should not be interpreted in any other way than as a negative result.

More information on what a faint line on a drug test means and how to read it 

Please contact our UK Drug Testing customer support team if you need any further help or advice.

You may also find this video on interpreting a faint line on a drug test helpful

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