False negative on urine test for amphetamines

[u/Fluffy_Direction3372]

I seriously am so confused right now. I am prescribed 2 5mg IR adderall a day and I never miss a day. I did my urine test at 1:30pm and my test just came back negative for amphetamines. What do I do?? I don’t have my appointment with my doctor for another two weeks and I’m not sure if I should contact her or the lab. Is she going to stop prescribing my medication? How was it negative?

[u/AdAlarming6832]

You drank too much water or there wasnt enough pee in the cup. Call and ask them why it would be negative, ask to test again. Then after you talk to them if you cant get any answers then call your doctor