One pattern I see in people who do have ADHD is a degree of aversion to medications. They dislike needing to take a medication or taking medication consistently, they want to be less reliant on medication (especially because they worry about forgetting to take meds). They often ask (or like the idea of) not taking medications (or taking less) on less cognitively demanding days. They tend to be quite enthusiastic about the idea of non-controlled options because they are more convenient to be on. Not a diagnostic pattern by any means, but I find it does help to differentiate people seeking treatment from people who want amphetamines.
I’ve often seen the same thing. Most of my patients like the idea of only using medication Monday to Friday, weekend off style arrangements. They don’t use all of what they have been prescribed and often have repeat scripts unfilled, which is fine in my book. In contrast the ones I flag as potential misusers have a pattern of getting their scripts dispensed early and consistently report “running out” before the next appointment, which in my practice should never happen as I calculate the amounts prescribed to fit between appointments.
Eg. here dex comes in packs of 100, so if someone is on 6/day I’d write it for 200 which should last just over a month if taken every day. So if I wrote a script for 6 months, and I get a call at 4 months that the patient has run out I know they’ve gone through 1200 in 4 months or 10/day.
Then I check the database and find that they have gone to different pharmacies or picked up a new script early every time. Once I see something suspicious I tighten things up considerably. Exact quantities for the month only – so 180 instead of 200, 30 day dispensing interval, no early pickups, single pharmacy only etc. If they’re not happy with that, they can go and see someone else.
Locally there are a few psychiatrists who prescribe what can best be described as “heroic” doses of medication (eg. Ritalin 160mg+/day, Vyvanse 210mg), as well as throwing in non-stimulants, but also things like lamotrigine, reboxetine and dementia drugs like memantine – reportedly all in the first consultation. Most are proponents of rapid titration – eg. increasing Vyvanse by 10mg every day until the patient feels something, which I still find bizarre and completely illogical.
Now a lot of these guys are extremely passionate about ADHD, and some work with a lot of forensic and substance use patients. Most have also run into issues with our national medical regulatory authority over prescribing practices. There's probably some kind of saviour complex going on too. But it did make me wonder – if you’re having to consistently resort to prescribing megadoses or offlable stuff (which many of us never have to) is it actually ADHD?
It's often the patients who present with something else who actually have undiagnosed ADHD.
Can remember seeing a young lady with bipolar – put her on lithium immediately as she presented in the most obvious floridly manic state, and things improved quite quickly. Six months on she’s stable, life is good and she has just re-enrolled in a university course. But she’s having a lot of problems there that are very suggestive of untreated ADHD. I remember her being visibly horrified by the suggestion and not wanting another diagnosis or more medication.