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Advanced Psychopharmacology: AACAP Meeting Oct.18-23, 2005 Chanvit Pornnoppadol, M.D.

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Institute 1:Timothy E. Wilens Institute 1: Timothy E. Wilens ADHD Pharmacological Straegies in Treatment Refractory ADHD Substance Use Disorders Advanced Psychopharmacologic Interventions for Adolescent Substance Use Disorders Bipolar Disorder Pharmacologic Strategies and Tactics for Treating Bipolar Disorder Juvenile Depression Juvenile Depression Anxiety Disorders Pharmacological Treatment of Anxiety Disorders Tics and Tourettes Disorder Tics and Tourettes Disorder Autism Psychopharmacology of Autism and Related Disorders

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Refractory ADHD Diagnosis Efficacy Adverse Effects Compliance Concomitant Medications Stressors ADHD Comorbidity

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Refractory ADHD: Prominent Executive Function Deficits Use of Norepi agent Atomoxetine, TCA, Bupropion (alone or combined with stimulant) Nicotinic/cholinergic agents Indirect: Donepezil, Galantamine Ineffective Direct: Nicotinic agents/patch - Effective

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Atomoxetine Uses Uncomplicated ADHD Refractory ADHD Comorbid ADHD Anxiety or depressive disorders Tic disorders Disruptive disorders Substance use disorders

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Atomoxetine Dosing (Wilens Method): Dosing (Wilens Method): Start at 0.5 mg/kg/day for 2 weeks, then increase to 1.2 mg/kg/d After 6 weeks if partial response, increase to 1.4 mg/kg/d (FDA approval) 1.8 mg/kg/d (studied) Reduce dose to 0.5 mg/kg/d if using known inhibitors of p448 (e.g. paroxetine, fluoxetine, ketoconazole)

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Atomoxetine Adverse effects: Adverse effects: - Somnolence, insomnia, nausea, headache, appetite suppression, GI upset/dyspepsia, BP/pulse (adults), sexual dysfunction (adults) Drug interactions: Drug interactions: - Other p448 inhibitors can inhibit Atomoxetine catabolism (paroxetine, fluoxetine) - No drug interactions with stimulants

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MGH Study: Atomoxetine + OROS MPH in ADHD (Wilens et al. unpublished data) Improved ADHD RS (p=0.028) Improved CGI-Severity of ADHD (p=0.009) 85% of combined group considered much/very much improved Significant effect on executive functioning High rates of side effects

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Bipolar Disorder Pharmacologic Strategies and Tactics for Treating Bipolar Disorder

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Mood Stabilizers Traditional Lithium Sodium Valproate Carbamazepine New/Novel Gabapentin Lamotrigine Topiramate Tiagabine Oxcarbazepine Levetiracetam Zonisamide

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Newer Antiepileptic Drug (AEDs): Gabapentin Mimics GABA, low S/E Adults: 2 controlled studies did not demonstrate efficacy in acute mania Cases of Disinhibition in children Dosing Start 150-300 mg Target range 900-2400 mg/d

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Newer Antiepileptic Drug (AEDs): Lamotrigine Adults: 2 controlled studies demonstrated efficacy for bipolar depression Not FDA-indicated in children age < 16 years Concern: serious rashes, Steven-Johnsons syndrome, serum sickness Small open label study in 20 adolescents with bipolar depression: 84% response (by CGI- C), 63% response (by CDRS-R)

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Newer Antiepileptic Drug (AEDs): Topiramate Blocks voltage-gated sodium channels Half-life: 21 hours (with inducers 12-15 hours) Controlled adolescent trial was negative. 2 adult BPD controlled studies were also negative. Start dose at 25 mg bid; increase to 200 mg bid

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Newer Antiepileptic Drug (AEDs): Oxcarbazepine 10-keto analogue of carbamazepine Lower adverse effects than CBZ Results of child/adolescent trial pending Dosing Start 150-300 mg/d Effective range 900-1800 mg/d

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Atypical Efficacy Evidence Acute ManiaMaintenance AdultsPedsAdultsPeds Risperidone +++++ND Olanzapine ++++ ND Quetiapine ++++++++ND Ziprasidone +++++ND Aripiprazole ++++++ND

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Juvenile Depression

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Treatment of Adolescent Depression Study (TADS) Approximate 400 adolescents with MDD 11 sites, NIMH Randomized to 12 weeks: Fluoxetine up to 40 mg CBT Fluoxetine plus CBT Placebo TADS: JAMA 2004;292:807-20

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TADS: CGI-I response at the end of 12-weeks of Px

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Effect Size for CGI-I (ITT)

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Suicidal Behavior General population: 17% of teens think about suicide in given year 12% of girls and 5% of boys make a suicide attempt Complete suicide: Girls = 2/100,000 Boys = 12/100,000 35-50% of depressed teens make a suicide attempt

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Pharmacological Treatment of Anxiety Disorders

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Pediatric OCD Treatment Study (POTS) Multicenter NIMH-funded study of 112 youths (7-16 yrs) with OCD Comparison of 12-wk CBT+Sertraline, CBT alone, Sertraline alone and placebo JAMA, 2004

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POTS Results Condition Remission Rate Effect Size CBT+Sertraline54%1.4 CBT39%0.97 Sertraline21%0.67 Placebo4%N/A

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School-Based CBT for Anxious Children Comparison of group CBT for children, group CBT + parent training, and no-treatment control Both active CBT interventions were more effective than control in decrease anxiety level. Adding parent training to child CBT resulted in additional benefits.

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Psychopharmacology of Autism and Related Disorders

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Risperidone Best studied Efficacious in controlling aggression, irritability, stereotypy, and hyperactivity Not efficacious in social impairment and communication deficit

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Other atypical antipsychotic trials in autism Clozapine: efficacious in 3 case reports Olanzapine: efficacious in 2 open-label trials Quetiapine: mixed efficacy in 4 retrospective studies Ziprasidone: efficacious in 1 case series Aripiprazole: efficacious in 1 case series

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Atomoxetine in PDDs with ADHD symptoms Prospective open-label study in 16 drug-free children with PDDs + significant ADHD symptoms Dosing: 0.5 mg/kg/d x 1 wk, then 0.8 mg/kg/d x 1 wk, then 1.2 mg/kg/d Dose increased to 1.4 mg/kg/d at week 4 for nonresponders Mean dose = 1.2 +/- 0.3 mg/kg/d

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Atomoxetine in PDDs with ADHD symptoms 12/16 (75%) much or very much improved on the CGI 2/16 (13%) much worse due to irritability Conclusions Encouraging results Possible alternative to stimulants and clonidine Placebo-controlled studies needed

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Core Symptom: Social Withdrawal Donepezil (Aricept) better than placebo in crossover study of 43 PDDS children Ongoing single site trials of donepezil and galantamine (Reminyl) D-cycloserine (NMDA partial agonist) reduced ABC social withdrawal in small pilot study (N=10)