What if the lower line is faint, is this negative? I do not use marijuana at all, but the lower line is faint?

It's true...if there is the faintest pink line...even if you have to squint to see it, it's a negative...ZERO trace of that drug. I've used these many times and they have always been accurate. I've never seen a false or bad reading.

My child is medicated for ADHD, which means he'll test positive for amphetamines. Does the test identify which drug is showing positive or negative?

Thank you for your inquiry. Many ADHD medications, such as Adderall, are common to come up positive for Amphetamines do to the similar metabolite properties found in Amphetamines. Please research the medications before testing or feel free to contact customer support for further information.Best Regards,Easy@Home Customer Service1.855.822.6999 M-F 9am-5pm CSTservice@easyathometesting.com

Should I be concerned in a formal testing environment if I'm testing negative with a faint line?

Amazon Customer:We understand your hesitation. A faint test line read with a control test line at 5 minutes is a negative result. Know that you met below the cut-off level. Our tests adhere to the FDA cut-off prescreen levels. Although we cannot assure you are CLEAN of the DRUG, test lines dark or faint read at 5 minutes with a control line is a negative result.Good luck to you. To learn more about testing tips, please contact us directly via Amazon messenger or call toll-free.Best Regards,LauraCustomer Service TeamEasy Healthcare Corporation1.855.822.6999 M-F 9am-5pm CST

does this test for heroin

Thank you for your inquiry. The OPI 2000 panel in this product will test for heroine and opioid medication in the system. You can also use a panel that is MOP (Morphine) to test as well found in our multi screen drug test kits. Please reach out about specifics.Best Regards,Easy at Home Customer Service1.855.822.6999 M-F 9am-5pm CST