Improving the methods for evaluating the safety of psychotropic medications in children and adolescents

Adverse event assessment methods in published trials of psychotropic drugs: Poor reporting and neglect of emerging safety concerns

BACKGROUND

Actual assessment methods for identifying adverse events (AEs) in clinical trials have received less scrutiny than underreporting of AEs.

OBJECTIVE

To investigate whether AE assessment has changed over time for three psychotropic drugs with turbulent histories of safety concerns since their U.S. approval.

METHODS

From industry-funded published trials of atomoxetine, duloxetine, and olanzapine retrieved from PubMed for 1996-2004 (n = 33) and 2009-2014 (n = 40), verbatim AE assessment and numbers of words describing efficacy and safety assessment were extracted.

RESULTS

Closest to drug approval (1996-2004), 77.8% of atomoxetine trials used open-ended questioning only, 50% of duloxetine trials used spontaneous self-report or clinician observation only, and 66.7% of olanzapine trials used a scale (primarily for extrapyramidal symptoms) and one former method. Recent studies (2009-2014) showed less rigor and transparency: 35.3% of atomoxetine and 64.7% of duloxetine studies reported no AE assessment method and 50% of olanzapine studies no longer used scales. Overall, the mean number of words describing efficacy assessment increased from 202 to 309 but decreased from 83 to 63 for safety.

CONCLUSION

Trial methodology for assessing psychotropic drug safety remains an underdeveloped area with major public health implications.

Adverse reactions to methylphenidate treatment for attention-deficit/hyperactivity disorder: structure and associations with clinical characteristics and symptom control

BACKGROUND

Methylphenidate (MPH)-related adverse events are well characterized. Their predictors and their relationship with therapeutic effects are less well understood. Here we examine these issues in relation to two long-acting formulations.

METHOD

Comparison of Methylphenidates in the Analog Classroom Setting (COMACS) was made in a large (n = 184) placebo-controlled trial comparing Equasym XL/Metadate CD, Concerta, and placebo (PLA) using a Laboratory School protocol. Therapeutic effects were measured using direct observation, scores on a simple math productivity task and parent ratings. Parents also completed the Barkley Stimulant Side Effect Rating Scale (BSSERS).

RESULTS

The BSSERS had six factors: Emotionality, sleep/appetite, disengaged, dizzy, uninterested, and aches. Treatment effects were seen only for emotionality (which improved) and sleep and appetite (which worsened). Adverse events were not predictable from personal and clinical characteristics of patients. Sleep/appetite adverse events were not associated with therapeutic effects. Improvements in attention-deficit/hyperactivity disorder (ADHD) and emotionality were correlated.

DISCUSSION

The results support a narrow conceptualization of MPH adverse events with problems restricted to appetite and sleep. These effects were not predictable on the basis of available information and may be due to an underlying mechanism rather distinct from those determining therapeutic effects.

Off-label psychopharmacologic prescribing for children: history supports close clinical monitoring

The review presents pediatric adverse drug events from a historical perspective and focuses on selected safety issues associated with off-label use of medications for the psychiatric treatment of youth. Clinical monitoring procedures for major psychotropic drug classes are reviewed. Prior studies suggest that systematic treatment monitoring is warranted so as to both minimize risk of unexpected adverse events and exposures to ineffective treatments. Clinical trials to establish the efficacy and safety of drugs currently being used off-label in the pediatric population are needed. In the meantime, clinicians should consider the existing evidence-base for these drugs and institute close clinical monitoring.

Unexpected effects of methylphenidate in attention-deficit/hyperactivity disorder reflect decreases in core/secondary symptoms and physical complaints common to all children

Abstract Hypotheses concerning unexpected, psychostimulant-related effects reported in previous studies were examined by separating behavioral/physical complaints highly specific to methylphenidate (MPH) from those that (a) may mimic core/secondary symptoms of the disorder, or (b) are commonly reported by unmedicated children in the general population. Sixty-five children with attention-deficit/hyperactivity disorder (ADHD) participated in a double-blind, placebo-controlled, within-subject (crossover) experimental design and received a placebo and four MPH doses in counterbalanced order following baseline assessment. Behavioral and physical complaints were significantly higher under baseline relative to placebo and the four immediate-release MPH conditions (5 mg, 10 mg, 15 mg, and 20 mg) across three symptom categories: ADHD core/secondary symptoms; symptoms commonly reported in the general population, including unmedicated children with ADHD; and symptoms highly specific to MPH. No significant differences were found among active drug conditions. Past unexpected findings of psychostimulant effects in ADHD may be due to the inclusion of scale items that reflect core/secondary features of ADHD and normally occurring behavioral/physical complaints in children.

The Subjective Experience of Youth Psychotropic Treatment

The psychotropic treatment of youth is increasing dramatically. This article examines child and adolescent psychopharmacological research and argues that social work practice and research must examine the complex relationships, social and psychological, in youth pharmacologic treatment. Regarding identity formation, this article explores the developmental consequences when youth adopt an illness narrative to make sense of everyday medication treatment. A conceptual framework for mapping the socio-cultural context of youth medication management is outlined. In the conclusion, youth psychotropic treatment is connected to a perplexing 'interpretive gap,' which highlights the subjective quality of medication treatment.