<human>: I was recently offered a job at a major corporation that a "no drug in the workplace" type of establishment. I have a valid prescription for adderall from my doctor, and I will be taking it when I have to go in for my drug test (it will be in an undetermined time in the future).

Is it possible to explain to the drug test people that I have a valid prescription but that I do not want my use of the drug released to the company? Are they allowed to do that? My university doctor writes one prescription at a time (so that we're not abusing the drugs and that it forces us to seek help from external doctors not affiliated with the school...long story, but you can still seek psychiatric help from the school without school health insurance and they obviously don't want to provide long term care because it's expensive for them, I guess) so I can't show an upcoming prescription as I will have graduated by the time I take the drug test.

Provide a brief overview of the text.
<bot>: need to have drug test people tell new employer I passed a drug test even though I will fail for amphetamine use (valid prescription). Is this possible? What do I need to do?