https://rxchat.com/Discuss/amphetamines-false-neg-test-250399_s2.htm?utm_source=forums_posts&utm_medium=RSS&utm_campaign=RSS i have been taking adderal for years now and got drug tested twice and both came up negative for amphetamine. Now the doctor will not prescribe them to me, but I take them twice a day. What could this be from???? Very frustrating.. - Filed in Amphetamines en-us Copyright 2026 RxChat.com. All Rights Reserved. Wed, 21 Aug 2013 01:57:49 GMT 60 https://rxchat.com/images/mc_logo.png https://rxchat.com/Discuss/amphetamines-false-neg-test-250399_s2.htm?utm_source=forums_posts&utm_medium=RSS&utm_campaign=RSS https://rxchat.com/Discuss/amphetamines-false-neg-test-250399_s2.htm?utm_source=forums_posts&utm_medium=RSS&utm_campaign=RSS#r_304748 https://rxchat.com/Discuss/amphetamines-false-neg-test-250399_s2.htm?utm_source=forums_posts&utm_medium=RSS&utm_campaign=RSS#r_304748 Demand another drug screen to be done somewhere else like your local hospital, I have had the same thing happen to me, I was told if you're takin other meds they can sometimes block the amphtmines from showing up. They can refuse your request for another drug screen, and if you get the drug screen done at your local hospital, just take your results to your doctor, if he refuses them, talk to the C.E.O over the whole doctors office and your doctor will be forced to atleast read your test results, but don't wait too long. Wed, 21 Aug 2013 01:57:49 GMT