Showing posts with label expert diagnosis. Show all posts
Showing posts with label expert diagnosis. Show all posts

Wednesday, November 26, 2014

How Do So Many People End Up on Stimulants?




There is no question that thousands if not millions of people end up taking stimulants unnecessarily these days.  Addiction psychiatrists,  have a unique perspective on this that I thinks goes beyond a typical approach to the problem.  I like to consider it to be grounded in behavioral pharmacology and neuroscience.   For the sake of this essay I will limit my remarks to all adults who are college aged or older and should not be taking stimulants.  Neuroscientific discoveries in the area of brain maturation suggest that a significant portion of the college-aged individuals might not make the same decisions they make a decade later, but the practical consideration is that there are millions of people in college making decisions about stimulants every day.  There are several ways to look at the problem.  The best approach I can think of is to look at the various ways that patients present for treatment.  The request for stimulant treatment can be subtle or overt.  Unlike some the papers in the current literature, I don't think that the diagnostic questions here are subtle.  During an initial clinical assessment - diagnosis and treatment commonly overlap and in some cases that I will illustrate treatment considerations become primary in the initial minutes of the interview.

The general psychiatric interview has always been a screen of sorts.  My recollection is that it was typically more problem focused in the past.  Over time, that interview started to incorporate more disorders as a focus of inquiry.  On the outpatient side the disorders added been primarily Post Traumatic Stress Disorder and Attention Deficit-Hyperactivity Disorder in non-geriatric populations.  Any time a screening is being done whether it uses a symptoms checklist or a lengthy interview there is always the chance of missing the true diagnosis or adding a diagnosis that is probably not there.  Here are a few examples.

1.  "I have been depressed for the past ten years...."  An inquiry about mood disorders at some point will focus on concentration.   Impaired concentration and attention span occurs in a number of psychiatric disorders.  Combined with some developmental history and a history of chronicity it is easy to see the problem as a missed diagnosis of ADHD and initiate treatment for that disorder in addition to the primary mood disorder.  There are problems with that approach especially when the history of the mood disorder is clear and it has never been adequately treated.

2.  "I have a diagnosis of bipolar disorder - manic and these medications aren't working...."  ADHD in adults rarely presents as hyperactivity so severe that it could be mistaken for mania.  Manic episodes are also phasic disturbances making it very unlikely that there would be many patients in any single practice who were both manic and had ADHD.  In the cases where it does happen stimulant treatment complicates the treatment of bipolar disorder and can lead to worsening mania, delusional thinking and hallucinations.

3.  "My son/daughter has ADHD....."  There are two variations in this interaction.  In the first, the parent is told about the high heritability of ADHD and advised that they also probably have it and can be assessed for it or mention to their primary care physician that they may need treatment for it.  In the second, the parent of a child with an ADHD diagnosis reads the diagnostic materials and comes into an appointment and says: "You know, I have read the symptoms and think that I have them.  Should I be treated for ADHD?"

4.  "I have always had a problem reading and I was  never any good in school..."  A common approach is to view this as ADHD, do the screening and proceed with treatment.  Physicians in general have had very little training in the assessment or treatment of learning disorder and although there is comorbid ADHD and learning disorders there is also a significant population of people with pure learning disorders who do not have ADHD.

5.  "I took my friend's Adderall and felt like I could concentrate and study for the first time in my life.  I did a lot better on that test...."  The population-wide bias is that stimulants are a specific treatment for ADHD rather than a drug that will temporarily improve anyone's energy level and attention span.  There is also the cultural phenomenon of cognitive enhancement or using stimulants as performance enhancing drugs that may be driving this request.  It is known that the availability of stimulants on campuses and in professional schools is widespread.  This is associated with students selling their prescriptions for profit and availability of stimulants illegally obtained for the purpose of cognitive enhancement.  The issue is further confused by position statements in scientific journals that support this practice.  I have not seen it studied, but it would be interesting to see questions and responses about cognitive enhancement asked at student health centers and practices that see a lot of college and professional students.

6.  "I have ADHD and need a prescription refill...."  It may be true that the patient has a clear-cut documented diagnosis prior to the age of 12 (DSM-5 criteria).  But what has happened since that initial diagnosis in childhood and now is critical history.  Has there been continuous treatment since then or has the treatment been disrupted.  Common causes of disruption include stimulant side effects, symptom resolution with age,  and co-occuring substance use problems.  A detailed history of the course of treatment since childhood is needed to make the decision to continue or reinitiate treatment.

7.  "I heard you had a test for ADHD...."  This question often initiates screening at a higher level.  There are any number of places with extended neuropsychological batteries, brain  imaging tests, or EEG tests that they claim will definitively diagnose ADHD.  In fact, there are no tests with that capability.  I have heard one of the top experts in the world on ADHD make that same statement and he was also a neuropsychologist.  I have had several years of experience with quantitative EEG machines and know their limitations.   At this point several hours of extended testing adds nothing to a detailed interview, review of collateral information, and symptom checklists to basically assure that all of the questions have been asked.

8.  "My meds need to be adjusted....."  This could be a question from a person in treatment for another problem or a person already being treated for ADHD.  The unstated issue here is the underlying belief that by adjusting a medication one's mental processes will be closer to perfection.  A child psychiatrist that I work with said it best:   "The goal in treating ADHD is to get them more functional, not to perfect their functioning."  I think the unrealistic goal of perfection drives a lot of prescriptions that exceed the recommended FDA limits.  It also explains a lot of "rescue medications" superimposed on sustained release preparations like Adderall.  Anyone familiar with the pharmacokinetics of sustained release drugs should realize why rescue medications (like immediate release Adderall on top of sustained release Adderall XR) are unnecessary.

9.  "I can't stay sober if I can't get treated for ADHD....."  This can be a complicated and confusing situation.  The child psychiatry literature had suggested initially that children with treated ADHD were less likely to have substance use disorders as adults than children with untreated ADHD.  As the evidence accumulates that is less clear.  Many adult psychiatrists and some addiction psychiatrists have extrapolated those equivocal findings to mean that treating a known or new diagnosis of ADHD in an adult will improve treatment outcomes for ADHD.  There is no evidence that is true.  Some addiction psychiatrists believe that the opposite is true, that there is a cross addiction phenomenon and that treating a person with an addiction makes it more difficult to stay sober from their drug of choice.  If the person is addicted to stimulant medication and has a clear history of accelerating the dose of stimulants or using them in unorthodox ways (intravenously, smoking, snorting, etc) it is very unlikely that person will be able to take a stimulant prescription in a controlled manner.  It is also very possible that the person making this request has a long history of experiencing prescription or street drugs as being necessary to regulate mental functioning.  That can be highly reinforcing even if the effects are sustained for hours or less.

10.  "I have been sober for one month and can't focus or remember anything......" Subjective cognitive problems are frequent during initial sobriety.  The substance used and total amount used over time probably determine the extent that the cognitive changes persist, but it is a difficult problem to study for those same reasons.  Clinicians know that there are cognitive effects but there is no standard approach to the problem.  From my experience, I think that two months sober is the absolute minimum time to consider evaluating subjective cognitive problems.  Even at that time getting collateral history about the person's cognitive and functional capacity and problem solving with them on work arounds would probably be the biggest part of the treatment.

The above scenarios are not exhaustive and I probably could come up with another 5 or 10 but they are illustrative of pathways to questionable stimulant use.  The common thread here is that anyone in these scenarios can endorse all of the symptoms of ADHD.  Figuring out what those symptoms are is fairly obvious on many checklists.  One of these checklists shows the symptoms and checkboxes necessary to make the diagnosis in grayed out panels.  It is easy to fake the symptoms in an interview or on a diagnostic checklist.  It takes a lot of hard work on the part of the physician to figure out not only who might be faking but also who has the symptoms but not the diagnosis.  One of the features of the DSM that was attacked by several critics during the pre-release hysteria was the "generic diagnostic criterion requiring distress or disability" to establish disorder thresholds (DSM-5 p 21).  In the case of ADHD that is Criterion D "There is clear evidence that the symptoms interfere with or reduce the quality of social, academic, or occupational functioning."  (DSM-5 p 60).

The diagnosis of ADHD is generally not the diagnosis of a severe functional disorder.  As a psychiatrist who practiced in a hospital setting most of the people I assessed clearly met the functional criteria by the time I saw them and diagnosed severe mood disorders, psychotic disorders, substance use disorders or dementias.   Many of them were by definition unable to function outside of a hospital setting.  It is an entirely different assessment when faced with a successful professional who has worked at a high degree of competence for 20 years who presents with any one of the above problems because they think they have ADHD.  It takes more than a review of the diagnostic criteria.   It takes an exploration of the patient's motivations for treatment.  What do they hope to accomplish by treatment?

It also takes a conservative prescribing bias on the part of the prescriber.  Stimulants are potent medications that can alter a person's state of consciousness.  They are potentially addicting medications and that can result in craving or wanting to take the medication irrespective of any therapeutic effect.  The wide availability of stimulants led to the first amphetamine epidemic in the United States.   When I first started out in psychiatry, I was still seeing people who became addicted to stimulants when they were widely prescribed for weight loss.   It is well known that the medications were ineffective for weight loss but people continued to take them at high doses in spite of the fact that they had not lost any weight.  In talking with people about what drives this many people feel like they are only competent when taking stimulants.   They believe that their cognitive and functional capacities are improved despite the fact that there is minimal evidence that this is occurring from their descriptions of what they are doing at work or in their family.

There are a number of strategies in clinical practice to avoid some of the problems with excessive stimulant prescriptions that I will address in a separate post.  My main point with this post was to look at some ways that people with mild subjective cognitive concerns, addictions, people seeking cognitive enhancement, people who have been functioning well but believe that they can function better come in to treatment for ADHD and get stimulant prescriptions.


George Dawson, MD, DFAPA

Supplementary 1:  Literature was used to construct these hypothetical scenarios.


Tuesday, June 3, 2014

The Issue With Patient Management Problems

So-called patient management problems have been building up on us over the past 30 years.  I first encountered them in the old Scientific American Medicine Text.  They are currently used for CME and more importantly, Maintenance of Certification.  To nonphysicans reading this they are basically hypothetical patient encounters that claim to be able to rate your responses to fragments of the entire patient story in such a way that it is a legitimate measure of your clinical acumen.  I am skeptical of that claim at best and hope to illustrate why.

Consider a recent patient management problem for psychiatrists in the most recent issue of Focus, the continuing education journal of the American Psychiatric Association (APA).  I like Focus and consider it to be a first rate source of the usual didactic continuing medical education (CME) materials.  Read the article, recognize the concepts and take the CME test.  This edition emphasized the recognition and appropriate treatment of Bipolar II Disorder and it provided an excellent summary of recent clinical trials and treatment recommendations. The patient management problem was similarly focused.  It began with a brief descriptions of a young women with depression, low energy, and hypersomnia.  It listed some of her past treatment experience and then listed for the consideration of the reader, several possible points in the differential diagnosis including depression and bipolar disorder, but also hypersomnia-NOS, obstructive sleep apnea, disorder and a substance abuse problem.  I may not be the typical psychiatrist but after a few bits of information, I would not be speculating on a substance abuse problem and would not know what to make of a hypersomnia-NOS differential diagnosis.  I would also  not be building a tree structure of parallel differential diagnoses in my mind.  Like most experts, I have found that the best way to proceed is to move form one clump of data to the next and not go through and exhaustive checklist or series of parallel considerations.  The other property of expert diagnosticians is their pattern matching ability.  Pattern matching consists of rapid recognition of diagnostic features based on past experience and matching them to those cases, treatments and outcomes.  Pattern matching also leads to rapid rule outs based on incongruous features, like an allegedly manic patient with aphasia rather than a formal thought disorder.

 If I see a pattern that looks like it may be bipolar disorder, the feature that I immediately hone in on is whether or not the patient has ever had a manic episode.  That is true whether they tell me that they have a diagnosis of bipolar disorder or not.  I am looking for a plausible description of a manic episode and the less cued that description the better.  I have seen evaluations that in some cases say: "The patient does not meet criteria for bipolar disorder."  I don't really care whether the specific DSM-5 criteria are asked or not or whether the patient has read them.  I need to hear a pretty good description of a manic episode, before I start asking them about specific details.  I should have enough interview skills to get at that description.  The description of that manic episode should also meet actual time criteria for mania.  Not one hour or four hours but at least 4 days of a clear disturbance in mood.  I recall reading a paper by Angst, one of Europe's foremost authorities on bipolar disorder when he proposed that time criteria based on close follow up of his research patients and I have been using it ever since.  In my experience practically all substance induced episodes of hypomania never meet the time criteria for a hypomanic episode.  There is also the research observation that many depressed patient have brief episodes of hypomania, but do not meet criteria for bipolar disorder.  I am really focused on this cluster of data.

On the patient management problem, I would not get full credit for my thinking because I am only concerned about hypersomnia when I proceed to that clump of sleep related data and I am only concerned about substance use problems when I proceed to that clump of data.  The patient management problem seems more like a standardized reading comprehension test with the added element that you have to guess what the author is thinking.

The differential diagnosis points are carried forward until additional history rules them out and only bipolar II depression remains.  At that point the treatment options are considered, three for major depression (an antidepressant that had been previously tried, an antidepressant combination, electroconvulsive therapy, and quetiapine) and one for bipolar II depression.  The whole point of the previous review is that existing evidence points to the need to avoid antidepressants in acute treatment and that the existing relatively weak data favors quetiapine.  The patient in this case is described as a slender stylishly dressed young woman.  What is the likelihood that she is going to want to take a medication that increases her appetite and weight?  What happens when that point comes up in the informed consent discussion?

The real issue is that you don't really need a physician who can pass a reading comprehension test.  By the time a person gets to medical school they have passed many reading comprehension tests.  You want a physician who has been trained to see thousands of patients in their particular specialty so they have a honed pattern matching and pattern completion capability.  You also want a physician who is an expert diagnostician and who thinks like an expert.  Experts do not read paragraphs of data and develop parallel tree structures in their mind for further analysis.  Experts do not approach vague descriptions in a diagnostic manual and act like they are anchor points for differential diagnoses.  Most of all experts do not engage in "guess what I am thinking" scenarios when they are trying to come up with diagnoses.  Their thinking is their own and they know whether it is adequately elaborated or not.

This patient management program also introduced "measurement based care".  Ratings from the Inventory of Depressive Symptomatology (IDS) were 31 or moderately depressed at baseline with improvements to a score of 6 and 4 at follow up.  Having done clinical trials in depression myself,  and having the Hamilton Depression Rating Scores correlated with my global rating score of improvement, I have my doubts about the utility of rating scale scores.  I really doubt their utility when I hear proclamations about how this is some significant advance or more incredibly how it is "malpractice" or not the "standard of care" if you don't give somebody a rating scale and record their number.  In some monitored systems it is even more of a catastrophic if the numbers are not headed in the right direction.  Rating scales of subjective symptoms remain a poor substitute for a detailed examination by an expert and I will continue to hold up the 10 point pain scale as the case in point.  The analysis of the Joint Commission 14 years ago was that this was a "quantitative" approach to pain.  We now know that is not accurate and there is no reason to expect that rating scales are any more of a quantitative approach to depression.

Those are a couple of issues with patient management problems.  The articles also highlight the need for much better pharmacological solutions to bipolar II depression and more research in that area.

George Dawson, MD, DFAPA


Cook IA.  Patient Management Exercise - Psychopharmacology.  Focus Spring 2014, Vol. XII, No. 2: 165-168.

Hsin H, Suppes T.  Psychopharmacology of Bipolar II Depression and Bipolar Depression with Mixed Features.  Focus Spring 2014, Vol. XII, No. 2:  136-145.