risperidone resulted in significantly greater reductions, compared
to placebo, in the scores on the modified compulsion subscale of the CY-BOCS
(effect size, 0.55), and the sensory motor behaviors subscale of the Ritvo–Freeman
Real Life Rating Scale (effect size, 0.45). Similar findings for risperidone’s benefit
for reducing repetitive behaviors have been found in adults with ASD, including
66 which found statistically significant reductions in the
modified version of the Y-BOCS (focusing only on repetitive behavior, not thoughts).
In Reichow et al. recent meta-analysis of medications for the treatment of ADHD
symptoms in children with PDD, methylphenidate had moderate, though not
statistically significant, benefits in treating stereotypies.
Despite valproate demonstrating efficacy for the treatment of irritability in Hollander
et al.’s study of children with ASD, it showed no significant improvement in
repetitive behavior, compared to placebo.
36 One small RCT of 1.5 g/day of omega-3
fatty acids (fish oil n = 7, placebo n = 5) showed no significant difference compared
to placebo in reduction of ABC Stereotypy, though effect size was 0.72.
Depending on the rating scale or etiologic theory, self-injurious behavior is
commonly thought of as either an act of aggression toward the self, or as a repetitive,
stereotyped behavior. Consequently, pharmacologic approaches to the treatment of
self-injury have been rooted in the approaches for the treatment of aggression or
repetitive behavior. Self-injurious behavior has its own literature base though, with
similar and dissimilar findings.
Typical and Atypical Antipsychotics
RCTs of typical antipsychotics for the reduction of self-injurious behavior in
individuals with developmental disabilities have had mixed findings. There has been
relatively unconvincing data for the benefit of haloperidol, fluphenazine,
chlorpromazine, or thioridazine in reducing self-injurious behavior.
the atypical antipsychotic with the most robust RCT data for improving self-injurious
behavior, with two relatively large RCTs in children with ID showing improvement
in the self-injury/stereotypic subscale of the Nisonger Child Behavior Rating
83,84 one of which was statistically significant,
84 and statistically significant
66 Similar to studies in children with ASD, weight
gain and somnolence were markedly higher in children taking risperidone than
Clomipramine has been shown to be effective in reducing self-injurious behavior, but
again with significant adverse effects.
82 Fluoxetine has been shown to be effective at
reducing compulsive skin picking in two RCTs,
85,86 and fluvoxamine has been
effective for reducing repetitive behavior and aggression in adults with ASD.
reports and open-label studies have shown possible benefit for buspirone and
A recent systemic review of naltrexone used in adults with intellectual disability
showed 8 out of 10 RCTs demonstrating a reduction in the frequency of self-injurious
87 More specifically, 50% of participants had improvement in self-injury,
with improvement being more pronounced in individuals with severe and profound
ID. Nine percent experienced minor adverse events, which included weight loss, loss
of appetite, thirst, yawning, mild liver function test abnormalities, nausea, and
tiredness. Dosing ranged from 0.5 to 2 mg/kg, and doses from 25 to 100 mg.
Overall, despite very limited evidence, it seems the literature supports the use of
risperidone, naltrexone, and clomipramine for the reduction of self-injurious
behavior in individuals with developmental disabilities. Additionally, fluoxetine and
fluvoxamine may have benefits as well, though less well evidenced.
Selective Serotonin Reuptake Inhibitors
Studies have found that individuals with PDDs are at high risk of comorbid anxiety
37,38 Due to the demonstrated benefits and relative safety of
SSRIs in typically developing children, SSRIs are very commonly prescribed for
depression or anxiety in children with developmental disorders, though the literature
has numerous case reports and open-label studies demonstrating SSRI-induced
improvements in anxiety in individuals with ASD.
Overall, the literature indicates that children with DD may respond differently to
SSRIs compared to children with typical development. Three areas in which
response to SSRIs may differ include risk of adverse events, dosing requirements,
Compared to children with typical development, children with DD are more likely to
experience adverse events to SSRIs and specifically are more likely to endorse
emotional/behavioral adverse events. The only two RCTs looking at SSRIs in
children with DD evaluated fluoxetine
repetitive behaviors. In the crossover study (8 weeks each phase) of low-dose
fluoxetine by Hollander et al.
(n = 39, mean age, 8.2 years), although there was no
statistically significant difference in treatment-emergent adverse events between
fluoxetine and placebo, the most common adverse events emerging during
fluoxetine treatment were agitation (46%), insomnia (36%), and anxiety/nervousness
(16%). Additionally, 16% of subjects required a dose reduction due to agitation
while on fluoxetine, compared to 5% on placebo.
In contrast, both Geller et al.
91 conducted RCTs of fluoxetine
for the treatment of OCD in typically developing children (Geller: 13 weeks; n = 71
fluoxetine, 32 placebo; mean age 11.4 years/Liebowitz: 8-week acute phase; n = 21
fluoxetine, 22 placebo; mean age, 12–13). In Geller et al.,
significant difference in reported adverse events, and the most common adverse
events reported in the fluoxetine group were headache (28%), rhinitis (27%), and
abdominal pain (16%), with no reports of agitation. In Liebowitz et al.,
events occurred significantly more frequently in the fluoxetine group: palpitations,
weight loss, drowsiness, tremors, nightmares, and muscle aches, and the most
common adverse events reported by those taking fluoxetine were headache (52%),
abdominal pain (43%), decreased appetite (38%), difficulty staying asleep (38%),
For citalopram, in the 12-week study by King et al.
placebo; mean age ~9 years), 97.3% of subjects with ASD treated with citalopram
experienced at least one treatment emergent adverse event. They were significantly
more likely to experience adverse events compared to those treated with placebo,
specifically: increased energy level (38%), impulsiveness (19%), decreased
concentration (12%), hyperactivity (12%), stereotypy (11%), diarrhea (26%),
insomnia (23.3%), and dry skin or pruritus (12%).
In contrast, in RCTs of citalopram for the treatment of depression in children and
adolescents with typical development, the most commonly reported adverse events
were headache, gastrointestinal issues, and insomnia.
93 of citalopram for typically developing children with
depression (n = 89 citalopram, 85 placebo; mean age, 12 years), rhinitis (14%),
nausea (14%), and abdominal pain (11%) were the only adverse events reported in
>10% of subjects taking citalopram, and in the 12-week RCT by von Knorring et al.
of citalopram for typically developing adolescents with depression (n = 124
citalopram, 120 placebo; mean age, 16 years), headache (26% and 25%), nausea
(19% and 15%), and insomnia (13% and 11%) were the most common in both groups
(citalopram and placebo, respectively), with only fatigue being the adverse event
reported significantly more often in the citalopram group (6%) than the placebo
Children with PDD typically require smaller doses of SSRIs compared to children
with typical development and may experience adverse emotional/behavioral events
at higher doses. For fluoxetine, the mean final daily dose of fluoxetine in Hollander et
78 of children with PDD was 9.9 mg, or 0.36 mg/kg. This is compared to
91 studies of typically developing children with
OCD, in which mean final daily fluoxetine dose was 24.6 and 64.8 mg (after the
acute phase), respectively. Additionally, in RCTs of typically developing children
with depression and other forms of anxiety, fluoxetine was well tolerated at mean
For citalopram, the mean daily dose in the King et al. study
and repetitive behavior was 16.5 mg. In studies of citalopram use in typically
developing children and adolescents with depression, citalopram was tolerated at
The issue of individuals with PDD requiring lower dosages of SSRI might
diminish in adulthood, because RCTs of SSRIs in adults with ASD demonstrate mean
daily doses close to that expected for typically developing adults: fluoxetine—36.7
You get a call from N.W.’s mother 3 days after N.W. starts the new medication regimen. N.W.’s mother
the results, N.W. is bradycardic and hypotensive. What is your recommendation?
The dose of risperidone that N.W. was started on is high. Additionally, you know
that fluoxetine is a strong 2D6 inhibitor, although risperidone and propranolol are
2D6 substrates. Therefore, fluoxetine may be decreasing the clearance of both the
risperidone and propranolol. You decide to call the provider and discuss the
interaction and adverse effects that N.W. is experiencing.
current regimen. What changes would you recommend?
You recommend discontinuation of the fluoxetine and initiation of sertraline 12.5
mg/day, because sertraline is a weaker inhibitor of 2D6. You would recommend the
continuation of risperidone at a reduced dose of 0.5 mg/day.
Most studies looking at symptoms of anxiety and depression in children with ASD
have used rating scales validated in typically developing children. For anxiety,
predictors that children with ASD will manifest a high level of parent-reported
anxiety include the following: IQ > 70,
102–104 higher levels of parent-rated social
; additionally, it seems that children with IQ <
70 might experience higher levels of parent-reported anxiety if they demonstrate
more adaptive social behaviors.
102,103 For depression, higher IQ and age seem
correlated with higher depression ratings
105 and both seem to predict lower selfperceived social competence in children with ASD.
106 Lower self-perceived social
competence, in turn, seems to predict high levels of depression symptomatology.
Additionally, it seems that adults with ASD with less social impairment (higher
social functioning) were more likely to be categorized as depressed.
seems to indicate that the more individuals with ASD are aware of social
impairments, or exposed to social interactions, the more likely they are to
demonstrate classically recognizable symptoms of anxiety or depression.
However, this body of literature, due to the scales that are used, only addresses
anxiety and depressive mood symptoms that are also seen in typically developing
who work with individuals with PDD are well aware that anxiety and depression
might manifest in alternative ways in this population. Individuals with ASD often
have impaired abilities to communicate their emotional experiences to others and can
have significant trouble managing their emotions. This routinely leads to alternative
manifestations of emotions like anxiety and depression, in the forms of rigidity,
tantrums, oppositionality, social avoidance, hyperactivity, repetitive behaviors,
irritability, aggression, and self-injury. As mentioned above, studies of SSRIs to
target some of these behaviors, have been mixed.
Overall though, it seems that case studies and open-label trials have shown
possible benefits for the use of SSRIs in children with PDD for the treatment of
classically recognized symptoms of anxiety and depression. To avoid significant
emotional and behavioral adverse events though, target dosing should be lower than
in children with typical development.
The medication with the strongest research backing for the treatment of sleep
disturbance in individuals with developmental disabilities is melatonin. Hollway and
found thirteen RCTs of individuals with sleep
disturbance, many of which also with developmental disabilities. All thirteen RCTs
had positive findings, particularly for sleep initiation and sleep maintenance, with the
longest trial being 10 weeks in duration. The effect sizes for sleep onset latency
ranged from .25 to 1.63, and for total sleep time from .25 to 1.0. Adverse effects
were generally mild and similar to placebo. Doses ranged from 2.5 to 10 mg.
/MT2 melatonin receptor agonist has limited evidence in children with
developmental disabilities, though considerable positive findings in adults with
typical development, specifically in primary insomnia and sleep maintenance.
Adverse effects were mild and similar to placebo, and doses ranged from 4 to 64 mg.
Although no RCTs have been conducted in children with developmental disabilities
and sleep disturbance, retrospective reviews have shown benefits in helping with
sleep disturbance, with doses ranging from 0.05 to 0.1 mg.
108 Doses ranged from 25 to 150 mg.
One open-label study in children and one RCT in adults showed benefits for the
treatment of sleep problems, with mild adverse effects, which included increased
appetite, irritability, and sedation.
108 Doses ranged from 7.5 to 45 mg.
Despite its abundant use in pediatric patients for sleep disturbance, only three RCTs
were identified by Hollway and Aman for its use in pediatric subjects.
studies were negative, one showed benefit, and none of them were specifically in
children with developmental disabilities.
Studies are limited, and none seem to have studied individuals with developmental
disabilities, though benefits seem greater in adolescents and adults, and less effective
In partially or uncontrolled studies in children, and controlled studies in adults, it
seems that benzodiazepines may be most effective at helping sleep disturbances
associated with parasomnias (e.g., periodic limb movement disorder, tongue biting,
REM sleep behavior disorder) though with considerable risks of adverse effects,
including tolerance, dependence, rebound insomnia, daytime sedation, and cognitive
Overall, it seems that melatonin is the most well-studied, effective, and safe
medication option for treating sleep disturbance in individuals with developmental
disabilities. Although promising evidence for ramelteon, trazodone, mirtazapine, and
clonidine exists, further research is needed in individuals with developmental
disabilities. Research evidence does not seem to support the wide use of
diphenhydramine for sleep disorders in children, and although zolpidem and
benzodiazepines may be of benefit for sleep in some, they should be used with
caution, and primarily in adults for zolpidem, and those with parasomnias for
effects. T.T.’s clinician asks for your opinion.
You note that the dose of melatonin last year may have been on the lower range
and you would recommend another trial of melatonin before considering a controlled
substance. The dose you would recommend is 5 mg taken approximately 1 hour to
T.T.’s bedtime. You note that this dose can be increased to 10 mg if an adequate
Summary of Target Symptoms and Pharmacologic Treatment
Target Symptom Treatment Medications/Classes to Consider
Hyperactivity Stimulants, atomoxetine, α2
Irritability/aggression Risperidone, aripiprazole
Repetitive behaviors Risperidone, aripiprazole, fluoxetine, clomipramine, fluvoxamine,
Self-injurious behavior Risperidone, clomipramine, naltrexone
Sleep Melatonin, ramelteon, clonidine, trazodone, mirtazapine, zolpidem,
SSRI, selective serotonin reuptake inhibitors.
A full list of references for this chapter can be found at
http://thepoint.lww.com/AT11e. Below are the key references and websites for this
chapter, with the corresponding reference number in this chapter found in parentheses
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Attention deficit hyperactivity disorder (ADHD) is a heterogeneous
psychiatric disorder that consists of multiple subtypes, including
inattention, hyperactivity/impulsivity, and a combination of these two
types. For diagnostic criteria to be met, there must be evidence that
these symptoms are present in multiple settings and that the individual
exhibited this psychopathology before the age of 12 years. These
symptoms cannot be because of other illnesses.
Behavioral therapy is an important component of any effective treatment
plan and typically includes educational interventions, creation of a
structured environment for the child, and introducing contingency
Stimulant medications are highly effective for the rapid relief of ADHD
symptoms and substantially improve a child’s prognosis. Individuals who
fail to respond adequately to one type of stimulant will often do well
with another, suggesting that subtle differences exist in the
pharmacologic mode of action. Although the duration of pharmacologic
action is relatively brief for stimulants, a variety of preparations have
been approved that can prolong the relief of ADHD symptoms and
There are a number of non-stimulant medications that have proven to be
effective for ADHD over the years, including atomoxetine a NE
reuptake inhibitor, and α-agonists. These medications may be viable
options for the management of treatment-resistant illness as well as in
patients with a history of substance abuse. They also possess a different
side effect profile than stimulants and have a delay until therapeutic
Many people are reluctant to consider stimulant medications for ADHD
treatment because of unfounded fears about drug tolerability and abuse.
As a result, there have been a wide variety of alternative treatments
considered for use, including changes in dietary habits, ingestion of
herbs and supplements, and other somatic interventions. At the present
time, the evidence supporting these options is sparse, although the rigor
of investigations has steadily improved in recent years, and there is hope
that some of these options may prove to be beneficial.
ADHD is commonly associated with several psychiatric and medical
comorbidities, and these concurrent conditions often influence treatment
plans. Tic disorders such as Tourette syndrome are frequently found in
children with ADHD, but research evidence suggests that stimulants
are not only safe but also effective in this particular population.
Some children with ADHD will continue to have symptoms of their
illness well into their adult years, usually of the inattention subtype.
There is a growing awareness that adults with ADHD have significant
social and occupational impairments. Fortunately, medications used to
treat ADHD in children appear to be equally effective in adults.
Stimulants are the most effective agents but have the unique side effect
risk of abuse and diversion. Monitoring for this is essential. If abuse or
diversion occurs then a reevaluation of the diagnosis is necessary as
well as a change to a medication with less risk of misuse.
Although the diagnosis and treatment of attention deficit and hyperactivity disorder
(ADHD) have been associated with considerable controversy, ADHD is a serious
psychiatric condition that has been well described in the medical literature for more
1 There are highly effective pharmacologic treatments that
ameliorate the core symptoms of the illness. These agents are generally safe and have
been shown to improve long-term prognosis.
By definition, ADHD symptoms manifest in childhood and will often persist into
adulthood in many cases. If left untreated, ADHD can produce significant
impairments in academic performance and social functioning; adults with ADHD are
often hindered in occupational settings as well.
3 Psychiatric comorbidities are
commonly encountered among individuals suffering from ADHD, including
developmental disorders, mood disorders, and substance abuse.
Although hyperactivity had been recognized as a troublesome childhood behavior
for many years, ADHD was not formally described in the Diagnostic and Statistical
Manual of Mental Disorders until the third edition was released in 1980. The
recently released DSM-5 describes three different subtypes of ADHD including
“Predominantly inattentive presentation,” “Predominantly hyperactive/impulsive
presentation,” and “Combined presentation.”
4 The DSM-5 also requires the diagnosis
by age 12, in contrast to DSM IV that required the onset of impairment before age 7.
Qualitatively the core symptoms of ADHD will differ according to gender, with boys
more likely to exhibit the hyperactive/impulsive subtype (vs. girls).
often change with time as hyperactive and impulsive behaviors recede during
adolescence, and inattention predominates among adolescents and adults with
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