Tolerability and efficacy of aripiprazole in a case of psychotic anorexia nervosa comorbid with epilepsy and chronic renal failure

Is aripiprazole a key to unlock anorexia nervosa?: A case series

Aripiprazole contributes an increase in body mass index and attenuation in anorexia nervosa (AN) symptoms, leading clinical improvements with lower side-effect profile; but it is not enough to cure comorbid depressive symptoms in AN.

Psychopharmacological advances in eating disorders

INTRODUCTION

Anorexia nervosa (AN), bulimia nervosa (BN) and binge eating disorder (BED) are the primary eating disorders (EDs). The only psychopharmacological treatment options for EDs with approval in some countries include fluoxetine for BN and lisdexamfetamine for BED. Given the high comorbidity and genetic correlations with other psychiatric disorders, it seems possible that novel medications for these conditions might also be effective in EDs. Areas covered: The current scientific literature has increased our understanding of how medication could be beneficial for patients with EDs on a molecular, functional and behavioral level. On the basis of theoretical considerations about neurotransmitters, hormones and neural circuits, possible drug targets for the treatment of EDs may include signal molecules and receptors of the self-regulatory system such as serotonin, norepinephrine and glutamate, the hedonic system including opioids, cannabinoids and dopamine and the hypothalamic homeostatic system including histamine, ghrelin, leptin, insulin, and glucagon-like peptide-1. Expert commentary: The latest research points to an involvement of both the immune and the metabolic systems in the pathophysiology of EDs and highlights the importance of the microbiome. Therefore, the next few years may unveil drug targets for EDs not just inside and outside of the brain, but possibly even outside of the human body.

The partial dopamine D2 receptor agonist aripiprazole is associated with weight gain in adolescent anorexia nervosa

OBJECTIVE

Finding medication to support treatment of anorexia nervosa has been difficult. Neuroscience-based approaches may help in this effort. Recent brain imaging studies in adults and adolescents with anorexia nervosa suggest that dopamine-related reward circuits are hypersensitive and could provide a treatment target.

METHODS

Here, we present a retrospective chart review of 106 adolescents with anorexia nervosa some of whom were treated with the dopamine D2 receptor partial agonist aripiprazole during treatment in a specialized eating disorder program.

RESULTS

The results show that aripiprazole treatment was associated with greater increase in body mass index (BMI) during treatment.

DISCUSSION

The use of dopamine receptor agonists may support treatment success in anorexia nervosa and should be further investigated.

A double-blind, placebo-controlled study of risperidone for the treatment of adolescents and young adults with anorexia nervosa: a pilot study

OBJECTIVE

The purpose of this double-blind, placebo-controlled exploratory pilot study was to evaluate the safety and efficacy of risperidone for the treatment of anorexia nervosa.

METHOD

Forty female subjects 12 to 21 years of age (mean, 16 years) with primary anorexia nervosa in an eating disorders program were randomized to receive risperidone (n = 18) or placebo (n = 22). Subjects completed the Eating Disorder Inventory 2, Color-A-Person Test, Body Image Software, and Multidimensional Anxiety Scale for Children at baseline and regular intervals. Weight, laboratory values, and electrocardiograms were monitored. Study medication was started at 0.5 mg daily and titrated upward weekly in 0.5-mg increments to a maximum dose of 4 mg until the subject reached a study endpoint.

RESULTS

The mean dose for the risperidone group was 2.5 mg and for the placebo group was 3 mg for a mean duration of 9 weeks. Subjects taking risperidone had a significant decrease on the Eating Disorder Inventory 2 Drive for Thinness subscale over the first 7 weeks (effect size, 0.88; p = .002), but this difference was not sustained to the end of the study (p = .13). The Eating Disorder Inventory 2 Interpersonal Distrust subscale decreased significantly more in subjects taking risperidone (effect size, 0.60; p = .03). Subjects taking risperidone had increased prolactin levels (week 7; p = .001). There were no significant differences between groups at baseline or the end of the study for the other rating scales, change in weight, or laboratory measurements.

CONCLUSIONS

This study does not demonstrate a benefit for the addition of risperidone in adolescents with anorexia nervosa during the weight-restoration phase of care. Clinical trial registration information-A Double-Blind, Placebo-Controlled Study of Risperidone for the Treatment of Anorexia Nervosa, http://www.clinicaltrials.gov, NCT00140426.

Aripiprazole in anorexia nervosa and low-weight bulimia nervosa: case reports

OBJECTIVE

There has been much interest in the use of atypical antipsychotics in anorexia nervosa (AN). However, newer, more weight-neutral medications have not been studied in AN, and there are no reports of the use of antipsychotics in bulimia nervosa (BN).

METHOD

We report on the treatment of eight patients (five with AN and three with BN) with aripiprazole for time periods of four months to more than three years.

RESULTS

All individuals had reduced distress around eating, fewer obsessional thoughts about food, weight and body image, significant lessening of eating-disordered behaviors, and gradual weight restoration where appropriate. Depression, generalized anxiety, and cognitive flexibility improved as well.

DISCUSSION

In summary, these findings support the need to perform controlled trials of aripiprazole in AN and BN.

Atypical antipsychotics and anorexia nervosa: a review

BACKGROUND

There is currently mixed opinion regarding the value of using atypical antipsychotics to treat anorexia nervosa (AN).

AIMS

To evaluate the literature on the use of atypical antipsychotics in AN.

METHOD

A review of all studies and clinical guidelines published before September 2009 involving use of an atypical antipsychotic in patients with AN. Analysis is by narrative synthesis.

RESULTS

Forty-three publications or study protocols were found, including four randomized-controlled trials, five open-label trials and 26 case reports. The most studied drugs were olanzapine, quetiapine and risperidone. Atypical antipsychotics appear safe and there is some evidence of positive effects on depression, anxiety and core eating disordered psychopathology in patients with anorexia nervosa. Currently there is insufficient evidence to confirm atypical antipsychotics enhance weight gain in this setting.

CONCLUSIONS

Further high quality evidence is needed in this area in order to provide practical guidance to clinicians. However, the main challenge is to persuade adequate numbers of AN patients to participate in research trials.

Transient psychosis in anorexia nervosa: review and case report

Psychotic symptoms are a key feature in eating disorders. Restrictive-type anorectics are more prone to suffer them, coherent with recent neurocognitive findings reporting attentional and processing deficits in restrictive anorexia partially common to schizophrenia. Psychotic crises urge psychiatrists to make an accurate differential diagnosis with endogenous psychoses and carefully judge treatment options. If attentively attended, such crises can give us clues to understand the patient s functioning and consider new strategies. We report two transient psychotic episodes in restrictive-type anorectic female patients, one with a previous experience. Onset of psychotic symptoms was related to severe malnutrition only in one of them (body mass index <15). We discuss risk factors, clinical presentation and treatment, focusing on the emotional disturbances maintained after recovery. Causes for psychotic features in these patients are reviewed and treatment individually tailored. An integrative understanding of eating disorders as a unique meeting point between psychosis and neurosis is encouraged.