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What Do Psychiatric Drugs Do? Further
Reflections on Methodology, Sources of Information, and Meaning
David H. Jacobs, Ph.D.
A fundamental distinction must be made
between a drug’s effects per se and a drug’s intended therapeutic
effects. It is only the existence of intended drug effects that
makes it possible to speak of side or adverse drug effects. In
medicinal drug research the focus is on the drug’s effects with
respect to the condition being treated. In this context it is never
the research task to broadly or comprehensively establish the drug’s
effects per se. In psychopharmacotherapy research the aim is
specific symptom reduction or alleviation. The question of the
drug’s impact on mental life broadly considered is not
investigated. In fact, the drug’s impact on mental life broadly
considered is never systematically addressed. The meaning of
drug-induced symptom reduction does not speak for itself. It is not
clear on the basis of focused efficacy research just what has
happened to the subject, including whether what has happened is or
is not salutary. The present paper addresses this issue.
Two very different answers can be
given to the following question: When treatment with a psychiatric
drug does result in symptom alleviation, just what has the drug
brought about to result in symptom alleviation? What, in short, has
happened? The favored model in psychiatry is that the drug’s
pharmacological activity has ameliorated a pre-existing brain lesion
(e.g., “Prozac ameliorates a pre-existing serotonergic deficit”
answers the question “Why does treatment with Prozac lift
depression?” Healy, 1999, provides a cogent discussion of the
now-dominant lesion model in psychiatry). A much less favored
answer ¾
but actually not that hard to find if one is prepared to look and
perhaps read between the lines a bit ¾
is that the drug’s neurotoxic activity has interfered with the
patient’s pre-drugged self-awareness and communications (e.g., is a
sedated grief-stricken person less grief-stricken?). In the favored
model emotional pain and so forth is a sign of neuropathology (in
the same sense that a seizure is a sign of neuropathology), and
drug-induced symptom reduction is desirable, therapeutic,
beneficial, salutary, etc. In the less favored model emotional pain
and so forth does not by itself indicate neuropathology,
and in the absence of evidence of genuine cerebral dysfunction
drug-induced symptom relief is seen as a likely indication of
iatrogenic brain injury. I do not think that a neutral candidate
answer ¾
some linguistic equivalent of don’t look a gift horse in the mouth
¾
is a responsible position to take, since (as I will argue) the
possibility that drug-induced symptom reduction betokens brain
injury must be taken seriously. A psychological understanding of a
person’s emotional pain and so on
¾
in contrast to a brain lesion model
¾
leads to a real sense of puzzlement when psychiatric medication
brings about reduced distress. What has happened? How could the
drug’s activity have altered the person’s own view of his/her
situation and attendant feelings and behaviors?
An unusually
illuminating presentation of the conceptual, linguistic, and
empirical ambiguities involved in depicting “antipsychotic” drug
effects as therapeutic or injurious is provided in a 1987 paper by
Van Putten and Marder. The paper begins by noting that neuroleptic-induced
akinesia
can be difficult to recognize and is often undiagnosed (by the
prescribers). The ambiguities I alluded to can be seen in the
following passage:
In the
treatment of schizophrenic illness with neuroleptics, akinesia, in
our experience produces a type of improvement. The patient talks
less of psychotic material, but he talks less of everything; he is
less bothered by his hallucinations, but he is less bothered by
everything else as well; he is less invested in his delusions, but
he is less invested in all else as well. Many patients with
akinesia experience a peculiar absence of emotions, appear
emotionally dead, and often state that everything is all right.
This type of improvement, which occurs particularly with higher
doses, is one that we should not be proud of. (p.15)
Van Putten and Marder then cite a prospective study of their own
involving newly admitted schizophrenic patients treated with
haloperidal. Ratings of these patients (presumably by others) on
the Brief Psychiatric Rating Scale (BPRS) schizophrenia factor were
inversely correlated with ratings of akinesia (presumably by
Van Putten and Marder; r = -.39, p = .004, pooled within-subject
correlations). In other words, the more the “antipsychotic” drug
created brain injury and its behavioral consequences, the less
psychosis was seen by those filling out the BPRS. Notwithstanding
the prior statement (quoted above) to the effect that neuroleptic-induced
akinesia is not a treatment effect to be proud of, Van Putten and
Marder only two paragraphs later state that when intractable
positive symptoms are distressing to the patient or to others
(italics added) “an akinetic dampening of the entire mental life is
desirable” (p. 16). This statement illustrates the shifting meaning
and ambiguity of “therapeutic drug effects” in psychiatry. The
authors do not directly address whether “antipsychotic” drugs
actually have antipsychotic properties in the literal sense, that
is, separate from the affective, cognitive, and behavioral
consequences of akinesia. They are clear that it is not difficult
for psychiatrists to regard neuroleptic-induced akinesia as
improvement, therapeutic, beneficial, etc. The leeway permitted by
considering drug effects therapeutic if the distress of others is
reduced should not be overlooked.
Van Puten and Marder
raise two issues I intent to develop: (i) adverse psychological
drug effects may be difficult to detect precisely because the
drugged person is a patient who is markedly distressed/disturbed
(e.g., is akinesia present? Is it an adverse effect or the desired
effect?), (ii) “improvement” or “symptom reduction” does not
necessarily mean that the treatment drug has induced a normal mental
state, or a mental state that is any more normal than the
pre-drugged condition (e.g., neuroleptic-induced akinesia is not a
normal mental state.)
A thoughtful reader of
Van Putten and Marder’s paper is likely to wonder why
non-recognition of neuroleptic-induced akinesia is common. Van
Putten and Marder emphasize that “the onus of detection is on the
physician, for the patient seldom complains. Indeed, even when
asked … the patient often denies any difficulty and is seemingly
locked in a peaceful, apathetic remoteness” (p. 16). A major theme
of the present paper is that psychopharmacotherapy researchers make
light of the onus of detecting neurotoxic drug effects. Note that
Van Putten and Marder’s observations were made in a clinical context
as opposed to a drug treatment efficacy research context.
The quote presented directly above suggests a certain hands-on
familiarity with the patients being treated with neuroleptics. An
earlier paper by the same authors (Van Putten et al., 1981) which
focused on patients’ subjective reactions to thiothixene described a
therapeutic setting wherein newly admitted schizophrenic patients
(to the Veterans Administration Medical Center in Los Angeles) were
provided “active milieu” treatment for seven to 14 days before being
tried on thiothixene if they failed to improve.
The familiarity with patients as individuals suggested by active
milieu treatment stands in sharp contrast to the de facto
anonymity of subjects as distinct personalities in conventional drug
treatment efficacy research. As long ago as 1960 F.A. Freyhan, a
pioneer in psychopharmacotherapy, warned that the large scale (many
research subjects) “check list” approach to psychopharmacotherapy
research could not avoid producing misleading information about the
effects of psychoactive medications: “ … experimental
investigations cannot be substituted for clinical explorations. It
must remain the clinician’s task to find out what it is that the
drug does to whom” (p. 197). As I have discussed in detail
elsewhere (Jacobs, 1999; Jacobs and Cohen, 1999), treatment efficacy
research is not designed for the purpose of ascertaining what the
drug did to whom. The focus of such research is very narrow
¾
was the investigational drug superior to placebo in terms of a
condition-to-be-treated-relevant research instrument (like the
Hamilton Rating Scale for Depression, or HAM-D)? The corresponding
side effect detection component of such research is quite
superficial (I will develop this point further).
From the beginning of
the modern era of psychopharmacotherapy (the era ushered in by
chlorpromazine in the 1950s) psychiatry has regarded what is treated
by drugs and the effects/efficacy of drugs in terms of conventional
somatic medicine.
This is the basic “villain of the piece” from which all problems
emanate. From within the paradigm of conventional somatic medicine
ambiguities about what is disease and what is “host”
are pushed aside along with specifically psychological and
psychosocial concerns regarding the full cost or burden to the host
of drug-induced symptom reduction. Only recently and haltingly has
conventional somatic medicine in general turned toward the question
of how to assess the short and long term consequences of medical
drugs on complex cognitive functions and complex behavioral
competencies
¾
a question that is immediately confronted by markedly underdeveloped
methods of investigation and assessment (Streufert and Gengo,
1993). Meanwhile
¾
and in stark contrast to somatic medicine ¾
the disease-host distinction in psychiatry faces extraordinary
conceptual and empirical difficulties, if not absurdities
(Kleinman, 1988; Widiger and Shea, 1991). The lesion model both
renders pharmacological treatment “medically necessary” and deflects
attention from what would otherwise stand out as the obvious working
assumption regarding long-term exposure to chemicals which act
directly on the brain, namely the assumption that long-term exposure
must have serious deleterious consequences (Summerfield, 1978).
The Side Effect
Detection Component of Psychopharmacotherapy Research from the
Perspective of Clinical Neurological Experience with Frontal Lobe
Injury
I will now begin to
develop the point that the “side effect” detection component of
psychopharmacotherapy research cannot bear examination from the
perspective of clinical neurology. It is first of all necessary to
outline relevant features of the conventional randomized placebo
controlled clinical trial (RCT) in psychopharmacotherapy research:
1. The usual time frame
for controlled psychopharmacotherapy research ranges from four to
eight weeks (the mode seems to be six weeks). I include this
feature in the present list because psychiatric medications are
intended for long-term use and are in fact used for long periods in
clinical practice (years, decades), so it is prima facie
highly unrealistic to conduct safety and efficacy research over a
four, six, or eight week period. Experience with “tardive” (late
appearing, as in tardive dyskinesia) pathological consequences of
psychiatric medications over the past forty-five years should have
ended such short-term research long ago. An extensive reading of
adverse drug reaction reports (ADRRs) published in psychiatry
journals makes it clear that individuals vary greatly in the time
course of vulnerability to the neurotoxic effects of psychiatric
drugs. The point is that terminating observations after four, six,
or eight weeks does not realistically address what effects the drug
may have as it is actually used in clinical practice.
2. The researchers and
the subject are essentially strangers when drug treatment initiation
begins. At best contact up to the point of drug treatment
initiation is limited to screening and diagnosis, itself a formal
question and answer affair. This arrangement dictates that the
researcher is likely to only notice gross or blatant drug effects
(marked tremor, myoclonic jerking, pronounced sweating, slurred
speech, etc.)
3. The researcher and
the subject only meet together for the purpose of brief and highly
structured sessions devoted to drug-relevant symptoms and side
effects review. This restricted interpersonal/diaglogical format
(narrowly focused, closed-ended questions) essentially eliminates
whatever skill or acumen the interviewer might possess as a
clinician in terms of detecting somewhat subtle forms of “behavioral
toxicity.” It cannot be overemphasized that the side effect check
list that the researcher goes over with the subject is limited to
blatant, mainly somatic adverse drug effects about which the subject
can self-report (nausea, diarrhea, vision problems, sleeping
problems, etc).
4. At least in so far
as recording and analyzing data for publication is concerned, the
subject’s own depictions of drug effects beyond the (mainly somatic)
side effects questionnaire created by the researchers is treated as
non-information.
5. Only the subject’s
self-report on the drug is regarded as information about drug
effects. This at one stroke relegates the entire issue of
drug-induced anosognosia (impaired self-awareness/self-monitoring) a
non-issue. Yet it could be argued (see ahead) that drug-induced
anosognosia is the core methodological challenge facing
psychopharmacotherapy research.
6. No attempt is made
¾
no channel for such information is created
¾
to receive reports from people in the subject’s “natural
environment” who do know him/her well concerning alterations in the
subject’s cognitive performances and social behavior. This throws
the entire adverse/neurotoxic drug reaction detection effort onto
the brief weekly meetings between researcher and subject (a highly
restricted linguistic, interactive, and social episode).
7. No effort is made to
present neurotoxicity/neuropathology-sensitive tasks or challenges
to the subject during the course of the clinical trial. This again
throws the entire ADR detection effort onto what can be gleaned in a
brief and highly restricted interview. Since the issue of detecting
somewhat subtle forms of drug-induced cerebral dysfunction is simply
not acknowledged in controlled psychopharmacotherapy research, this
area of research has contributed nothing to the problem of detecting
chemically-induced cerebral pathology before gross signs of
illness emerge.
The design of controlled
psychopharmacotherapy research does not address itself to detecting
somewhat subtle forms of cerebral pathology. Clinician-initiated
reports “from the field” of drug-induced behavioral toxicity do
appear in psychiatric journals (mainly in the form of brief Letters
to the Editor), but the dominant view of such reports from the
perspective of psychopharmacotherapy researchers is that their
validity is unknown because they do not derive from controlled
studies (e.g., Gram, 1994; I think it is apparent that we are
speaking here
¾
referring to controlled psychopharmacotherapy research
¾
of a closed circle). What is missing both from ADRRs “from the
field” and from dismissals of such reports on the part of
researchers is a realistic discussion of the built-in insensitivity
of the side effect detection component of controlled research. Such
a discussion would have to address the limitations I outlined above.
The paucity (and thus diagnostic
invalidity) of what can be gleaned even by an experienced clinical
neurologist under restricted observational conditions is clearly
depicted by Stuss (1991) in a review chapter on frontal lobe
injury. Stuss attempts to characterize the deficits/impairments
which typically arise specifically from frontal lobe injury on the
basis of a review of relevant clinical literature and his own
extensive clinical experience. An important source of information
concerning specific frontal injury derives from clinical studies of
post-lobotomized patients, since in this procedure the aim is to
only make incisions in the frontal region. The application of this
procedure in the 1940s and 1950s not only to a wide spectrum of
psychiatric conditions but also in the treatment of non-psychiatric
conditions (notably chronic pain) greatly facilitates the task of
drawing conclusions.
Stuss also reviews endogenous neurological conditions and post
traumatic (that is, mechanical trauma) neurological injuries to the
frontal region.
The disparity between what can be
detected by a clinical neurologist during office visits (not
detected, that is) and what is dramatically obvious to people who
know the patient well in his/her everyday life is illustrated by
reviewing the case of R., a patient Stuss personally treated. R. is
described as a highly educated and successful businesswoman who
first came to neurological attention due to seizure activity. A
right frontal astrocytoma was surgically removed, followed by
irradiation and chemotherapy to eliminate tumor growth. R. resumed
work one year post-surgery, but some time after that returned for
neuropsychological assessment at the insistence of her husband.
R. herself initially denied having any problems (this is called
anosognosia in clinical neurology). Neuropsychological
examination revealed excellent abilities, even on “frontal” tests (Porteus
maze, Wisconsin card sorting, etc.). If the assessment question had
rested only on R.’s test performances and observable conduct in
Stuss’ office there would have been little or no reason to suppose
that R. had become seriously impaired. Yet reports concerning R.’s
behavior in “natural” settings conveyed to Stuss by her husband and
others indicated a very different picture of her overall mental
status.
For example, under her own direction
it was difficult for R. to get to work before 11 A.M. This is only
one concrete example of a general deficit which Stuss refers to as a
disturbance in self-awareness and cognate expressions
(self-consciousness, self-reflectiveness, etc.). There seems to be
general agreement that frontal damage results in a disturbance of
higher-order “executive” capabilities. This form of impairment may
be essentially invisible unless the person is adequately challenged
in the appropriate realm of mental life (recall R.’s excellent
performance on the neuropsychological assessment battery). Many
situations in life do not challenge the individual in such a manner,
and in such situations the frontally damaged person may appear
intact. Stuss in fact comments that “in many respects R. was
totally normal or unimpaired” (p. 77). But obviously this is not
the end of the story, and indeed it could be said that the behavior
of frontally damaged persons serves to expose how much of everyday
life is not structured by others who are in addition continuously
present to provide surrogate self-monitoring.
Fisher (1989) has commented that
“unawareness accompanies so many neurological defects that one might
invoke anosognosia as a broad principle of cerebral dysfunction in
human beings” (p. 127). Stuss wishes to distinguish
frontally-produced unawareness (anosognosia) from anosognosia that
accompanies damage to other areas of the brain (e.g., unawareness of
paralysis). I am inclined to think that frontal anosognosia is of
special interest to psychiatry. Stuss specifically states in his
concluding remarks that “disorders of self-awareness can be present
with normal sensorium and normal of even superior IQ, memory, and so
on” (p. 78). My own chief concern, to recall, is the problem of
understanding what has happened when psychiatric medication
brings about symptom-reduction (e.g., Prozac-induced relief from
depression).
An especially revealing clue to
understanding the effects of frontal injury is provided by the
employment of procedures (surgery and ECT) which damage the brain
for the express purpose of treating otherwise intractable pain
associated with various medical conditions (neuralgia, carcinoma,
phantom pain, etc.). Deliberate physician-produced brain damage for
pain treatment is mentioned in Stuss’ (1991) review and also in a
chapter on the frontal lobes by Brown (1988), but neither author
gives this phenomenon the attention I think it deserves. Brown
(1988) comments that lobotomy and lobectomy used for pain treatment
bring about an altered emotional reaction to pain rather than in an
alteration of the pain threshold. It is interesting to try to
reconcile the treatment of pain via deliberate frontal damage
with the usual generalization that frontal damage results in
enhanced “stimulus boundness,” that is, inability to detach from
present stimulation. The apparent contradiction can be conceptually
reconciled by focusing on the consequences of disturbed
self-awareness for emotional life. Stuss notes that prominent
advocates of lobotomy in the 1940s and 1950s came to think that
lobotomy had the effect of dramatically reducing self-concern
because it impaired the patient’s capacity to apprehend him/herself
historically, that is as simultaneously having a past, present, and
future. From this perspective it follows that the patient’s
emotional reaction to pain is altered because the patient’s capacity
to grasp the significance of the pain as imbued with implications
for the personal future is lacking or substantially reduced.
ECT, Anosognosia, and Symptom
Improvement
The deliberate induction of
anosognosia as psychiatric improvement was discussed openly for a
period of at least two decades by Max Fink, one of American
psychiatry’s most prominent advocates of ECT. Fink’s insight
concerning anosognosia was undoubtedly fostered by his close
association with Edwin Weinstein and Robert Kahn, the authors of
what has come to be regarded as a seminal work in clinical neurology
on the subject of anosognosia (Weinstein and Kahn, 1955). In their
1955 book Weinstein and Kahn reviewed their experience with ECT-induced
anosognosia as a treatment for intractable pain, but beyond this
they did not discuss possible implications of physician-created
anosognosia for clinical psychiatry. However, by 1956 Kahn, Fink,
and Weinstein jointly published a paper on their clinical experience
using ECT in the treatment of strictly psychiatric conditions
(depression, schizophrenia, and mania).
In the 1956 paper Kahn, Fink, and
Weinstein specifically discuss “improvement” in terms of the
broadened concept of anosognosia advanced by Weinstein and Kahn in
1955, i.e., “A concept of anosognosia was advanced which included
not only denial of hemiplegia [the paradigmatic case of anosognosia
introduced by Babinki in 1914] and blindness but denial of many
other aspects of illness and problems of living” (p. 23,
italics added). In their series of 24 patients treated with ECT,
only those who were injured enough by the procedure to become
anosognosic were regarded by hospital staff as improved: “If the
patient denies he has any problems or that he is troubled by them,
or if he cannot recall any, he is rated as improved. Such patients
appear affable and uncomplaining, their manner reinforced by cliches
and banalities, themselves adaptive [to brain injury] forms of
language” (p. 28). The authors were equally clear that ECT-induced
improvement was only temporary because patients recovered
from the brain injury produced by shock treatments (the
injury-induced anosognosia remitted, in other words). This paper,
then, openly presented a model of the second possible scenario I
depicted in my introductory statement, that is, of emotional
distress etc. not brought abut by neuropathology which is treated by
iatrogenic brain injury. Note that in this scenario neurological
recovery brings about psychiatric relapse. Kahn, Fink, and
Weinstein had no illusions as to why this occurs
¾
when the anosognosia clears, the patient finds himself in the same
intra and interpersonal predicament, and the treatment (ECT) has
definitely not provided him with any additional psychological
resources for living (all the patients in this report were men).
In the course of their
commentary on ECT-produced brain injury, anosognosia, and
“improvement,” Kahn, Fink, and Weinstein in effect suggest a method
for realistically evaluating the consequences of direct physical
intervention in brain functioning. First of all the patient must
have sufficient opportunity prior to somatic treatment to discuss
his/her personal difficulties (i.e., the patient’s own view of
meaning, history, development, situational and interpersonal
influences, and so forth). Secondly, following a course of somatic
treatment (or some segment) and “symptomatic improvement,” it is up
to clinical researchers
to assess through dialogue with the patient and probably others as
well the extent to which improvement represents enhanced
psychological functioning vs. anosognosia (denial, indifference,
inexplicable unconcern about past events and likely future
developments, etc.). The contemporary approach to
diagnosis/assessment based on the neuro-lesion model
¾
that is, emotional pain etc. is simply the subjective component of
neuropathology
¾
in effect denies the necessity to contextualize and interpret the
meaning of symptom reduction (pain, distress, anguish, etc is bad,
reduction is good).
SSRI-Induced Frontal Lobe Injury,
Anosognosia, and Symptomatic Improvement
A recent half-hearted ADRR
concerning fluvoxamine and fluoxetine in the treatment
(respectively) of panic disorder and major depression illustrates
many of the issues discussed above. I characterize this ADRR as
“half-hearted” because the authors, Hoehn-Saric et al. (1990),
ultimately cannot make up their minds as to whether fluvoxamine and
fluoxetine-induced frontal lobe dysfunction should be
considered a neurotoxic effect or a therapeutic/salutary drug
effect. Thus they only reduced the dosage of fluoxetine in
case number five of their report despite persistent behavioral
symptoms of frontal lobe dysfunction because of concomitant
improvement in mood. Their final comment is worth quoting since it
rather dramatically portrays the conceptual, linguistic, and
evidentiary ambiguities concerning what psychiatric medication
brings about that I have tried to bring into focus:
…apathy and indifference may be dose-related
toxic effects that are unrelated to the anxiolytic or antidepressant
effects of fluvoxamine or fluoxetine. However, it is also
conceivable that the induction of a mild form of indifference or
disinhibition is a therapeutically important ingredient of serotonin
reuptake blocking medications. Such action could explain why
imipramine, which has serotonin reuptake blocking effects, was more
effective in patients with generalized anxiety disorder than
alprazolam in attenuating the tendency to worry excessively and why
antidepressants with serotonin reuptake blocking properties were
found to be superior to other antidepressants in
obsessive-compulsive patients. (p. 345)
Hoehn-Saric et al. begin
the paragraph which contains the above quote with the following
statement: “Not all patients on fluvoxamine or fluoxetine react in
the manner described above. Many recover from depression or anxiety
disorder without significant side effects” (p. 345). But the
question must immediately be posed: How do they know? Their own
case summaries clearly state that they personally noticed nothing
amiss about their patients during the course of office visits.
Their eventual diagnosis of drug-induced frontal lobe dysfunction
was based entirely on patients’ reports of untoward developments as
drug treatment continued over time. Further, it was more the case
than not that patients eventually pieced together that something was
wrong from the reactions and feedback proffered by others rather
than from their own self-monitoring/self-evaluation capacities. For
example, regarding case number one: “Only gradually did he come to
realize intellectually the extent of his neglect, but he still could
not get upset about it” (p. 343). When Hoehn-Saric et al. were
informed of neglect, apathy, indifference, etc. by this patient,
they reduced his dosage of fluvoxamine from 150 mg/day to 100
mg/day. On the reduced dosage the patient no longer complained
of frontal lobe dysfunction symptomatology, which the authors
equate with “functioning well.” But having raised the issue of
frontal lobe dysfunction themselves (even citing Stuss and Benson’s
1986 text on the frontal lobes as support for their diagnosis of
frontal lobe dysfunction), it should be clear to Hoehn-Saric et al.
that the formula “no complaints = functioning well” simply will not
do, precisely because the expectation of impaired
self-monitoring/self-awareness vitiates relying so heavily on
self-report.
As is customary in ADRRs
in psychiatry journals, Hoehn-Saric et al. express no curiosity
about why numerous RCTs with fluvoxamine and fluoxetine (prior to
and following FDA approval) have failed to detect indications of
frontal lobe dysfunction, nor what might be done to render RCTs more
sensitive to drug-induced frontal injury. Nevertheless, it is
apparent that both the time frame of RCTs (four, six, or eight
weeks) and researcher-controlled restrictions on what subjects can
say operate to eliminate the possibility that what Hoehn-Saric et
al. detected in clinical practice would be detected in an RCT. RCTs
are drug treatment efficacy investigations, which in practice
means comparing the short-term fate of certain (drug-relevant)
symptoms in response to drug treatment or placebo treatment. The
purpose of a drug efficacy RCT is certainly not to investigate the
effects of the drug on a broad range of cognitive and
social-behavioral capacities and performances. This is a
different research question and enterprise. Among the lay
public there is probably an understandable assumption that safety
claims concerning a psychiatric medication encompass the question of
the drug’s effects on mental and social life broadly considered. In
fact only a narrow range of drug toxicity is investigated by
developers of psychiatric medication leading up to FDA approval.
Following FDA approval the issue of efficacy is further explored,
but the investigative approach to “side effects” detection does not
change.
Strategies for Realistically Assessing
the Psychological Effects of Psychiatric Drugs
The clearest research
strategy for realistically assessing the impact of a psychiatric
drug on mental life is to systematically investigate its effects
in therapeutic dosages and durations on normal volunteers. The
reason for this does not seem to be generally appreciated. The
psychopharmacotherapy pioneer who originated the term “target
symptom,” Fritz Freyhan, can also be given credit for propagating a
fundamental misunderstanding concerning how to realistically
evaluate the impact of psychoactive drugs. Freyhan (1960) argued
reasonably enough that the clinical study of drug effects
(that is, treatment) depends on the identification of “targets” on
which the drug is presumed to exert its action and upon appropriate
patient selection, e.g., a drug which is presumed to alleviate
headache can only be assessed in patients who actually have
headache. In the very next sentence (p. 186), apparently to
buttress his point, he remarks that an investigation of the
antidepressant properties of amphetamine (as opposed to its appetite
suppressant properties) cannot be carried out with an obese but
emotionally harmonious patient because he/she would not experience
much if any mood change. This is a doubtful proposition, to say the
least. The mistake here is profound: amphetamine is not a specific
medication for depression
¾
an “antidepressant”
¾
if in fact it alters mood regardless of whether the person is
depressed or not (nor are amphetamines specific medication for
“attention deficit” if they act to narrow and focus attention on
relatively mindless tasks even for people who do not have difficulty
paying attention
¾
in this regard see the strangely neglected paper by Rappaport et
al., 1978). There is, then, quite a good reason for using normal
volunteers to investigate the effects of a medication for headache:
the drug may not even have analgesic properties, it may for example
actually induce global indifference and unconcern, but it would
be much more difficult to determine this if only people with
headache were studied. A general principle of drug effects
investigation can be stated: It is more not less
difficult to realistically assess a drug’s properties when the drug
is used to treat a clinical problem, especially when the drug has
psychoactive properties and is used to treat psychiatric problems.
Since many psychiatric
drugs are extremely unpleasant and/or dangerous to take, it is
understandably a major challenge to induce non-clinical volunteers
to take such drugs in therapeutic dosages and durations.
Physicians, medical students, and normal volunteers who have taken a
single dose of a neuroleptic make it abundantly clear why it is
probably not practicable to use normal volunteers to test
therapeutic dosages and durations of neuroleptics (Anderson, Reker,
and Cooper, 1981; Belmaker and Wald, 1977; Healy and Farquhar, 1998;
Kendler, 1976). As part of her dissertation research an
anthropology student, Sue Estroff (1981), took a low clinical dosage
(5 mg) of fluphenazine (Prolixin) for almost six weeks. Actually
the diary entries she made on Prolixin and which she presents in her
1981 book stop at four weeks. Estroff does not explain this in her
book, but it is reasonable to surmise from her diary entries that
after four weeks on Prolixin she was no longer able to make diary
entries, e.g., day ten: “Having a hard time sitting down to do
notes and take notes at report” (p. 104). Her diary entry after 16
days on Prolixin reads in part: “The feeling of self-containment
grows … As if there were a glass barrier between me and others –
emotions subdued and flat if there” (p. 105). Since Estroff was not
being treated with Prolixin for schizophrenia or any other
psychiatric condition, there is little ambiguity about whether the
effects she reports should be considered toxic/adverse or not. As I
have proposed, greater ambiguity concerning how to depict drug
effects is created when the drug is used clinically (is
“emotions subdued and flat if there” a toxic or adverse effect when
psychotic agitation is the “target”?). This is why it is invaluable
to obtain information about drug effect from non-clinical subjects
(commenting on their own experience with a single 5 mg dose of
haloperidol, two psychiatric researchers
¾
Belmaker and Wald [1977]
¾
remark as follows: “Dopamine blocking by neuroleptics may function
to restrict cognitive and emotional processes in normals as well as
schizophrenics, and thus it is possible that it does not
specifically antagonize schizophrenic pathology” [p. 222-223]).
It is also of great
importance (for the same reason) to carefully record the effects of
somatic psychiatric interventions when they are used for
non-psychiatric purposes (e.g., lobotomy and ECT for pain, discussed
above). Kushner (1999) has reviewed the use of haloperidol in the
treatment of Tourette’s syndrome, which at least in America for the
past forty years has been seen as a neuropathological disorder.
Kushner reports that the professional literature mainly focuses on
the efficacy of haloperidol for suppressing involuntary
vocalizations and movements (tics). But people who have actually
been treated with haloperidol and members of their families have
told Kushner personally that “zombification” is the main effect of
haloperidol from their perspective. The implication is that
haloperidol is not a specific “antipsychotic” drug but rather a drug
which suppresses movement, emotion, and thought in many if not all
persons who take it.
Since it is impractical
to obtain information concerning the effects of therapeutic
dosages and durations of psychiatric drugs on people who are not
being treated for a psychiatric diagnosis, it is a fortiori
necessary to draw upon persons who have been psychiatrically treated
in order to obtain broader information concerning the effects of
these drugs than is provided by efficacy research. One
obvious method to advance what is known about the effects of
psychiatric drugs is to provide people who have been treated with
them an opportunity to talk about their own experience in their own
words when they are not “on” the drug. It is rather fascinating to
contemplate just how alien and irrelevant such information seems
from the perspective of efficacy RCTs.
The importance of off-drug depictions of drug effects is twofold:
(a) to avoid the enormously confounding issue of drug-induced
anosognosia, although this throws the whole investigation into the
realm of memory, and (b) to capitalize on perspective, that is, the
person no longer on the treatment drug can reflect evaluatively on
the pros and cons of the treatment he/she received.
The importance of encouraging people to talk about drug effects in
their own words should be evident by now. The reader of a published
drug treatment efficacy RCT has literally no idea what the treated
subjects thought about the drug’s effects (on the drug or later, off
the drug). An efficacy RCT already names and regards the
treatment drug in terms of its desired effects
¾
e.g., an “antidepressant.” A person who is very upset and dysphoric
(drawing upon my own clinical experience) may welcome the emotional
relief provided by what is called an antidepressant in
psychiatry, but nonetheless depict the drug’s effects in words that
have little if any obvious connection to how the drug is designated
in psychiatry (by, for example, describing the drug’s effects as
emotionally numbing, muting, flattening, suppressing, etc.). A drug
that is thought to literally counter or nullify depression
implicitly creates one set of expectations concerning its impact on
the person as a psycho-social being, while a drug that is depicted
as numbing, flattening, etc. emotional life in general creates a
distinctly different set of expectations. The point here is that
there is much to learn from drug-treated persons themselves about
drug effects and consequences beyond what is provided by specific
“target symptoms” research instruments used in treatment efficacy
RCTs.
I do not of course think
that an ethnographic investigation which draws upon formerly drug
treated psychiatric patients can by itself solve the problem of
creating a realistic picture of the effects of psychiatric drugs on
mental life (in my usage here a “psychiatric patient” is anyone who
has been treated with one or more psychoactive drugs for a
psychiatric diagnosis or mental-emotional-behavioral difficulties).
The problem is very complex and must be systematically
“triangulated” (meaning that many methods of investigation yielding
diverse forms of information must be generated in order to piece
together a realistic picture). An ethnographic inquiry with
formerly treated patients does not, to be more specific, obtain
information from individuals who have been in a favorable position
to observe drug-induced changes in the treated person, nor does it
obtain test performance information of any kind. But, in line with
an overall strategy of “triangulation,” encouraging formerly treated
persons to reflect upon their experience with psychiatric
medications can provide one conspicuously neglected source of
information about the effects of psychiatric drugs on mental life.
Concluding Remarks
The key observation that “symptom
alleviation” brought about by the physician via direct action on the
patient’s brain requires further investigation as to meaning was
made by Kahn, Fink, and Weinstein in their 1956 report on the use of
ECT in psychiatric treatment. Their sensitivity to this issue was a
natural extension of Weinstein and Kahn’s seminal book concerning
anosognosia as a common clinical phenomenon in many forms of
neurological disease and injury which occurred both independently of
the physician and due to the physician’s deliberate treatment
efforts. It is true that Weinstein, Kahn, and Fink for their own
part expressed no reluctance to bring about transitory symptom
alleviation via brain injury-induced anosognosia, but all the same
it was clear to them that this source of “clinical improvement”
should not be confused with enhancement of the patient’s adaptive
psychological resources (p.28).
It is obvious that drug
treatment research in psychiatry from the 1950s through to the
present has declined to investigate the meaning of drug-produced
symptom alleviation. How can this be understood? Clearly, market
(that is, pecuniary) considerations play a prominent if not
overriding role in the overall picture, but I do not wish to dwell
on this point here except to note that The New England Journal of
Medicine has recently concluded that the “sponsor’s” influence
on published research findings in the realm of psychopharmacotherapy
is such that it would be naïve to accept published reports at face
value (Angell, 2000 ; Bodenheimer, 2000). I cannot see that anything
of substance has changed since this view was expressed 18 months ago
(as I write this paper) in America’s most prestigious medical
journal. But I rather wish to reflect upon the consequences of
regarding emotional distress and so on literally as medical
disorders for the conduct of psychopharmacotherapy research.
I will use as a text a
well-known 1978 paper by Gerald Klerman, one of America’s most
influential psychiatrists and policy makers from the 1970s until his
death in 1992 (during the 1980s he served as head of NIMH and head
of the Alcohol, Drug, and Mental Health Administration [ADAMHA], and
was co-director of Upjohn’s multinational research project leading
up to FDA approval of Xanax as the only FDA approved treatment for
panic disorder). In this paper Klerman was keenly aware that the
torch in American psychiatry was about to be passed from the
Meyerian school of thought (the biopsychosocial view) to the
self-named neoKraepelinians, or biopsychiatrists, a development in
which Klerman himself was a major figure. He was therefore concerned
to provide an explicit rendering of the neoKraepelinian framework of
thought (he used the word “credo”) and to put the best face on it.
Klerman introduced his
rendition of the neoKraepelinian credo by noting that it rejects the
Meyerian emphasis on “personal experience and the uniqueness of the
individual in his social context” and replaces it with an emphasis
on identifying the biological bases of discrete mental illnesses.
It was – of course – difficult for Klerman to provide examples of
discrete mental illnesses with known biological causes, but his
choices convey the mind-set of biopsychiatry very well: syphilitic
disease of the brain and aminoacidurias and chromosomal
abnormalities which produce mental deficiencies. Such examples
(which, it could be argued, are actually marginal to psychiatry)
make it quite clear that neoKraepelinian thought rejects as
irrelevant the view that “symptoms” arise from the workings of the
personality as a whole as the individual strives to adapt to his/her
slice of the social world and his/her own inner (psychological)
life. In the 1980s Klerman advanced the same idea with regard to
“panic disorder” (1988; he seems to have recanted in a paper
prepared shortly before his death in 1992, i.e., Shear, Cooper,
Klerman, et al., 1993). The point that Klerman is making, namely
that neoKraepelinians regard discrete diseases and the
person as separate entities was elucidated even more clearly in
a companion piece appearing in the same volume by Irwin Savodnik, in
which Savodnik admitted that neoKraepelinians have no interest in
the “host” other than as “a container for the disease process.” This
view is entirely consistent with Klearman’s own exemplars of medical
psychiatry (above).
My hope is that
elucidating what biopsychiatrists think about the nature of “mental
illness” can help answer why psychopharmacotherapy research makes no
effort to investigate the meaning of drug-induced symptom
alleviation. Psychopharmacotherapy efficacy research is virtually
always aimed at a specific Axis I “thing” (clinical entity) which,
it is assumed, arises from its own unique neuropathology
(unfortunately not known with certainly), but which in any event is
separable from the person who is afflicted with it ( as in
an endogenously produced seizure disorder, or Tourette’s syndrome).
The Axis I “it” being treated is defined in terms of the presence of
several blatant symptoms which allegedly constitute a syndrome (like
panic disorder or major depressive disorder).
Since the ‘it” being
treated in psychopharmacotherapy research is deliberately divorced
from biography, ontogeny, and personality (the person’s
adaptation to life considered holistically), there is little
interest in investigating how the treatment drug influences the
patient’s life in terms of just those complex psychological
considerations which have been expunged in order to liberate
psychiatry from the Meyerian (biopsychosocial) framework and return
it to mainstream medicine. In other words, I am proposing that the
blatant unconcern about detecting the treatment drug’s effects on
“complex cognitive functions and complex behavioral competencies”
(after Streufert and Gengo, 1993) that is manifest in
psychopharmacotherapy research is entirely consistent with the
neoKraepelinian agenda of resolutely turning away from the “host” as
the subject of interest (I should note that Lennard et al. made a
similar point in 1971). Thus, psychopharmacotherapy efficacy RCTs
(which, again, are almost always about an Axis I disorder) do not
introduce side effect possibilities that are more complex than the
deliberately medicalized symptoms that define what is being treated.
For example, the treatment research paper which apparently acted as
the last straw for The New England Journal of Medicine’s
editorial committee (Keller et al., 2000) shows the usual symmetry
between what is being treated (major depressive disorder) and the
treatment drug’s side effects, i.e.:
|
Major Depressive Disorder
(from DSM-IV, p.327) |
|
adverse effects of nefazodone (Serzone),from
Keller et al., 2000 |
|
depressed mood |
|
headache |
|
diminished interest or pleasure |
|
asthenia (weakness) |
|
weight loss or gain |
|
dry mouth |
|
increased or decreased appetite |
|
nausea |
|
insomnia or hypersomnia |
|
diarrhea |
|
agitation or retardation |
|
constipation |
|
fatigue or loss of energy |
|
somnolence |
|
feeling worthless or guilty |
|
dizziness |
|
lightheadedness |
|
insomnia |
|
concentration or thinking
difficulty |
|
agitation |
|
thoughts of death or suicide |
|
abnormal vision |
|
|
|
blurred vision |
|
|
|
sexual dysfunction |
The total investigative
interest in what treatment with nefazadone brought about was
exhausted by a maximum of two administrations of the Hamilton Rating
Scale for Depression and a 15 to 20 minute question and answer
period once a week devoted to concomitant use of medications,
symptoms, side effects, and illnesses between visits (p.1463). In
short, the usual approach to drug effects detection (outlined above)
was employed. If my own discussion of what would be involved in a
realistic attempt to discern drug-induced psychological alterations
has merit, it should be evident that the usual approach employed in
a psychiatric drug treatment efficacy RCT is tantamount to turning a
blind eye towards drug-induced psychological alterations. I
particularly want to re-emphasize the brief, highly structured,
researcher-dominated question and answer interview devoted to
somatic possibilities which carries the burden of side effects
detection in psychoparmacotherapy efficacy RCTs. What we as readers
really want to examine (via transcripts or even videotapes) is (a)
what subjects actually said in the weekly interviews dedicated to
symptoms and side effects review, and (b) the nature of the
interview, that is, to what extent did the interviewer attempt to
create a situation in which subjects were encouraged to reflect upon
and talk about drug effects in everyday life? It is imperative to
recall that Hoehen-Saric et al. (1990) were only able to detect
fluoxetine and fluvoxamine-induced frontal lobe injury in virtue of
allowing their patients (who were not participating in an efficacy
RCT) to tell stories about their lives on the treatment drug as time
wore on. I am pointing to a phenomenon that is entirely familiar to
psychotherapists who encourage their clients to speak freely about
personal matters: under such circumstances people wind-up revealing
information that they barely if at all were cognizant of before they
found themselves talking about it ( Wyatt [1986], a psychoanalyst,
refers to this as the “knowing through telling paradigm”).
Naturally, executing realistic methods for discerning what
psychiatric drugs do would be time consuming, labor intensive, and
expensive. The alternative is what prevails today: not knowing what
psychiatric drugs do.
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