Psychopharmacology of Autism Spectrum Disorder

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Presentation transcript:

Psychopharmacology of Autism Spectrum Disorder Christopher J. McDougle, MD Director, Lurie Center for Autism Professor of Psychiatry and Pediatrics Massachusetts General Hospital and MassGeneral Hospital for Children Nancy Lurie Marks Professor Harvard Medical School

I have no relevant financial relationship to report in the last 12 months with a commercial interest.

Off-Label Use Of Medication In this presentation, all discussion of use of medication refers to “off-label” use other than risperidone and aripiprazole for irritability in children and adolescents with autistic disorder

Pervasive Developmental Disorders DSM-IV Autistic Disorder Asperger’s Disorder Rett’s Disorder Childhood Disintegrative Disorder Pervasive Developmental Disorder Not Otherwise Specified DSM-5 Autism Spectrum Disorder

Evaluation Diagnosis Physical Examination Neuropsychological Testing Genetic Testing Electroencephalogram (EEG) and/or Brain Imaging (CAT scan or MRI scan)  

Treatment Options Behavior therapy Speech and Language therapy Occupational therapy Physical therapy Social skills therapy Special educational services (academic vs. life skills track) Treatment of comorbid medical problems, including seizures Vocational training Pharmacotherapy  

Treatment Options (cont’d)   Special education services (academic vs. life skills track) Treatment of comorbid medical problems, including seizures Vocational training Pharmacotherapy

Target Symptoms for Medication Motor hyperactivity and inattention Interfering ritualistic behavior Aggression, self-injury, severe tantrums Mood disorders: depression, bipolar Anxiety disorders Others: sleep disturbances, pica, inappropriate sexual behavior

Motor Hyperactivity and Inattention Psychostimulants: methylphenidate, dextroamphetamine Alpha-2 agonists: guanfacine, clonidine, Intuniv Non-stimulants: atomoxetine, bupropion, tricyclic antidepressants

Psychostimulants Work quickly Side effects: reduced appetite, insomnia, tics May cause behavioral worsening May need to be given multiple times per day Need new prescription each month

Alpha-2 Agonists Need to monitor blood pressure and heart rate Can be sedating May cause constipation Generally don’t make symptoms worse 2/3 need to be given 2-3 times per day Intuniv now FDA-approved for ADHD in children

Non-Stimulants Atomoxetine: effective in ADHD; effective for ASD in children. May take longer to work than stimulants. Generally won’t make tics worse. May help with comorbid mood and/or anxiety.

Non-Stimulants (Cont’d) Bupropion: has been shown to be effective for ADHD. Not well-studied in developmental disabilities. Can lower the seizure threshold and should NOT be given to a patient with a history of seizures or active seizure disorder. Can make tics worse.

Non-Stimulants (Cont’d) Tricyclic antidepressants: not well-studied in developmental disabilities. Associated with side effects including: dry mouth, blurry vision, constipation. Can lower the seizure threshold. Can affect cardiac rhythm.

Ritualistic Behavior Selective Serotonin Reuptake Inhibitors (SSRIs) Fluoxetine Fluvoxamine Sertraline Paroxetine Citalopram Escitalopram

SSRIs Data indicate SSRIs may be more effective in post-pubertal vs. pre-pubertal individuals with developmental disabilities Side effects: insomnia, sedation, stomach upset, sexual dysfunction, weight gain Can generally be given once a day Concern about increasing suicidal thinking/behavior

Aggression/Severe Tantrums/Self-Injury Typical antipsychotics Atypical antipsychotics Mood stabilizers Alpha-2 agonists Naltrexone

Aggression (Cont’d) Typical Antipsychotics Haloperidol Thioridazine Chlorpromazine Side effects: acute extrapyramidal symptoms (EPS), tardive dyskinesia (TD), sedation, weight gain, drooling

Aggression (Cont’d) Atypical Antipsychotics Clozapine Risperidone Olanzapine Quetiapine Ziprasidone Aripiprazole Paliperidone

Clozapine Common side effects include weight gain, sedation, drooling Can lower the seizure threshold Agranulocytosis and need for careful blood monitoring

Risperidone Well-studied in autism (FDA approval) and intellectual disability associated with behavioral dyscontrol Common side effects: weight gain, sedation (transient), drooling, elevated prolactin

Olanzapine Only small controlled studies in developmental disabilities Common side effects: weight gain (at times significant), has been associated with glucose and lipid dysregulation, sedation

Quetiapine No controlled studies in developmental disabilities Common side effects: weight gain (may be less prominent than with clozapine and olanzapine), sedation, orthostatic hypotension if dose increased too quickly

Ziprasidone No controlled studies in developmental disabilities Common side effects: sedation (transient), occasional insomnia or behavioral activation. Not associated with significant weight gain Should not be given to patients with cardiac problems Must be taken with food

Aripiprazole FDA-approved for “irritability” in children and adolescents with autism. Common side effects: EPS and nausea/vomiting if given at too high a starting dose. Occasionally transient sedation or activation (akathisia) No prolactin elevation

Paliperidone Major active metabolite of risperidone Potentially fewer drug-drug interactions Once daily dosing Potentially less weight gain and prolactin elevation than risperidone

Aggression (Cont’d) Mood Stabilizers Valproic acid Lithium Carbamazepine Gabapentin Topiramate Lamotrigine

Valproic Acid A controlled study in autism found no drug vs. placebo difference Common side effects: sedation, weight gain Need to monitor blood level for therapeutic range and to follow liver function tests May be useful in patients with seizures and aggression

Lithium No controlled studies in developmental disabilities Common side effects: tremor, polydipsia, polyuria, weight gain Need to monitor blood for therapeutic range and to follow kidney and thyroid function

Carbamazepine No controlled studies in developmental disabilities Common side effects: dizziness Need to monitor blood level for therapeutic range and to follow blood count and sodium level

Gabapentin No controlled studies in developmental disabilities Common side effects: some sedation, some weight gain No need to monitor blood levels Not particularly effective on a clinical basis

Topiramate No controlled studies in developmental disabilities Common side effects: sedation, cognitive dulling. Not associated with weight gain No need to monitor blood levels

Lamotrigine Controlled study in autism found no drug vs. placebo difference Must increase the dose very slowly Steven’s – Johnson rash

Aggression (Cont’d) Alpha-2 Agonists Guanfacine: not particularly effective for aggression Clonidine: can be effective for aggression. Need to balance sedation vs. clinical benefit Need to monitor blood pressure and heart rate

Aggression (Cont’d) Naltrexone - Occasionally effective on a clinical basis - No significant side effects - Need to monitor liver function

Mood - Depression Bupropion Venlafaxine (elevated blood pressure) Duloxetine SSRIs Mirtazapine (weight gain, sedation) Tricyclic antidepressants

Mood - Bipolar Valproic acid Lithium Carbamazepine Gabapentin Topiramate Lamotrigine (Steven’s Johnson Syndrome)

Sleep Disturbance - Insomnia Melatonin Clonidine Trazodone (priapism) Mirtazapine Tricyclic Antidepressant (Doxepine, Amitriptyline) Chloral Hydrate Benzodiazepines (Paradoxical rxt’m) Dephenhydramine (Paradoxical rxt’n)

Anxiety Buspirone Mirtazapine (weight gain, sedation) SSRIs (low dose)

Pica SSRIs Behavioral strategies

Inappropriate Sexual Behavior SSRIs Hormonal strategies Behavioral strategies

QUESTIONS?

Lurie Center for Autism Christopher J. McDougle, MD Ann Neumeyer, MD Nora Friedman, MD Yamini Howe, MD Sarah Kadzielski, MD Christopher Keary, MD Michelle Palumbo, MD Ron Thibert, MD Diana Wasserman, MD Kirstin Birtwell, PhD Gillian Erhabor, PhD Alanna Gold, PhD Alyssa Milot, PhD Lisa Nowinski, PhD Julia O’Rourke, PhD, MS, MMSc Dema Hakim, BS Jennifer Mullett, RN CCRP Elizabeth Masterman, MSW Karyn Wagner, BA http://www.massgeneral.org/children/services/treatmentprograms (781)-860-1700

LURIE CENTER FOR AUTISM Christopher J. McDougle, M.D. CMCDOUGLE@PARTNERS.ORG (781) 860-1783