Are you implying that someone who is prescribed and takes Adderall is a drug addict?
Nope. Only that people can and do abuse these prescriptions like many others. And the manner in which the OP "forgot" to fill a prescription and then changed the date is consistent with those that do engage in funny business with their prescriptions.
Dude, if you're correctly prescribed adderall - it doesn't give you any high! Oh, except for the pink elephants.
That's why there is a black market ... the people that do NOT need it, want it.
I understand what Adderall is and what it is. I have a tiny bit of training and experience in this area.
Someone with ADHD forgot to have a prescription filled....OMG, that's so weird...who with ADHD would forget/fail to do something...
Huh ... you're running out of your needed medication ... you see the doctor ... you get a new prescription but don't fill it. That tells me one of a couple of things happened: (1) You did not need it all that much since what little you had remaining was sufficient to last for months, or, (2) you don't need it at all and hoard the prescription as a means to earn an extra buck.
Most people I know that have Adderall take it daily or nearly so. Not needing it for a few months just ain't gonna happen. Are there people that might only need it at certain times? I suppose there are. I would suggest they relate that to their physician as there may be alternatives to Adderall if it is not necessary so often, but it is not a common occurrence in my experience and indicative of criminal behavior. As with any act that is consistent with a criminal act, it is not 100% certain that the person is engaged in an ongoing criminal enterprise, but the actions certainly lend one to believe that is a serious possibility.
And, of course, in this case the OP DID commit a crime, didn't they? It is the true motivation that seems to be a matter of speculation.