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Extrapyramidal symptoms (EPS) affect 15% to 30% of patients with schizophrenia treated with antipsychotics and have been associated with poor patient outcomes.
Objectives
To examine the incidence and economic burden of EPS in patients with schizophrenia initiating treatment with atypical antipsychotics (AAPs).
Methods
Patients with schizophrenia newly initiating AAPs with no prior EPS were identified in the MarketScan Commercial and Medicare Supplemental database from January 1, 2012 to December 31, 2018. Incidence of EPS (new diagnosis or medication) was assessed in the year following AAP initiation. Patients were classified as developing (EPS cohort) or not developing (non-EPS cohort) EPS. All-cause and schizophrenia-related healthcare resource use and costs were compared between cohorts over the year following the first EPS claim (EPS) or randomly assigned index date (non-EPS). Multivariate models were developed for total healthcare costs and inpatient admissions.
Results
A total of 3558 patients qualified for the study; 22.1% developed EPS in the year following AAP initiation (incidence: 26.9 cases/100-person-years). Multivariate analyses demonstrated that EPS patients had a 34% higher odds of all-cause (OR:1.3361, 95% CI:1.0770-1.6575, P < .01) and 84% increased odds of schizophrenia-related (OR:1.8436, 95% CI:1.0434-2.4219, P < .0001) inpatient admissions, as well as significantly higher all-cause (EPS: $26,632 vs non-EPS: $21,273, P < .001) and schizophrenia-related (EPS: $9018 vs non-EPS: $4475, P < .0001) total costs compared to the non-EPS cohort.
Conclusions
Approximately 20% of patients developed EPS in the year following AAP initiation. The significant increases in healthcare resource utilization and costs in the EPS cohorts highlight the need for treatments that effectively target schizophrenia symptoms while reducing the risk of EPS.
Extrapyramidal symptoms (EPS), including movement disorders, tremors, and muscle contractions are common side effects of atypical antipsychotic (AAP) drugs in patients with schizophrenia. This study examined the incidence and burden of EPS in patients with schizophrenia initiating AAPs.
Methods
Patients with schizophrenia initiating AAPs with no prior EPS were identified in the MarketScan Multi-state Medicaid database from 1/1/2012-12/31/2018. Incidence of EPS (identified via ICD-9/ICD-10 diagnoses and medications) was assessed during the 12-months following AAP initiation. Cohorts with and without EPS were defined. Demographics, clinical characteristics, and healthcare resource use and costs over 12 months following the first EPS claim (EPS) or randomly assigned index date (Non-EPS) were assessed.
Results
A total of 11,642 patients with schizophrenia were identified; 21.2% developed EPS in the 12-months following AAP initiation. EPS and Non-EPS cohorts included 2,295 (mean age 38, 61% male, CCI 0.6) and 5,607 (mean age 39, 57% male, CCI 0.7) patients, respectively. Over the 12-month post-index period, EPS cohort had significantly higher rates of all-cause (30.2% vs. 24.6%, p<0.001) and schizophrenia-related hospitalizations (22.5% vs. 12.9%, p<0.001) and schizophrenia-related emergency room visits (25.5% vs. 16.7%, p<0.001) compared to Non-EPS cohort. All-cause ($25,911 vs. $21,550, p<0.001) and schizophrenia-related healthcare costs ($12,134 vs. $6,230, p<0.001) were significantly higher in EPS vs. Non-EPS cohort.
Conclusions
In the 12 months following AAP initiation, over 20% of schizophrenia patients developed EPS, which was associated with increased healthcare resource utilization and costs. Treatment options that minimize EPS may reduce the economic burden of schizophrenia.
SEP-363856 is a novel psychotropic agent without dopamine D2 receptor occupancy. Although its mechanism of action has not been fully elucidated, preclinical data suggest that agonism at trace amine receptor 1 (TAAR1) and the serotonin 5-H1A receptor contributes to its efficacy. In a double-blind (DB), placebo-controlled study, SEP−363856 demonstrated significant efficacy in the treatment of an exacerbation of schizophrenia (Koblan et al, NEJM 2020; 82:1497–1506). We present results of a 6-month extension study whose aim was to evaluate the safety and effectiveness of longer-term treatment with SEP−363856.
Method
Patients with an acute exacerbation of schizophrenia who completed a 4-week, DB, placebo-controlled, flexible-dose (50 or 75 mg) study of SEP−363856 were given the option to enroll in an extension study in which they were treated, open-label (OL), with flexible doses (25/50/75 mg/d) of SEP−363856 for 26-weeks. The primary outcomes were safety measures; effectiveness outcomes were secondary and included the PANSS total score and the Brief Negative Symptom Scale (BNSS) total score.
Results
A total of 193 patients completed the 4-week DB study, and 156 (80.8%) were dosed in the OL extension study and received at least one dose of SEP−363856 (safety population). Study completer rate was 66.9%; reasons for discontinuation consisted of adverse event (11.5%), withdrawal of consent (10.2%), lack of efficacy (5.1%), and other (6.4%). 15 patients experienced an SAE: schizophrenia (n=11); acute psychosis (N=1); uterine hemorrhage and suicidal ideation (N=1 each); there were no deaths in the study. Individual AEs with an incidence =2% were schizophrenia (12.2%), headache (11.5%), insomnia (8.3%), anxiety (5.1%), somnolence (4.5%), nasopharyngitis (4.5%), nausea (3.8%), irritability (3.2%), influenza (3.2%), weight decreased (3.2%), and prolactin increased (2.6%). On movement scales, minimal mean change from OL-baseline to Week 26 occurred on the Barnes total score (−0.1), AIMS total score (0.0) and SAS score (−0.1). Mean month 6 change from DB baseline in weight was −0.3 kg. No clinically meaningful median changes were observed at week 26 in metabolic laboratory parameters (total and LDL cholesterol, triglycerides, hemoglobin A1c) or in prolactin levels. During 6 months of OL treatment, one patient had an increase in QTcF =60 msec; no patients had a QTcF interval =480 msec. Treatment with SEP−363856 was associated with significant improvement from OL baseline to week 26 in PANSS total score (−22.6) and BNSS total score (−11.3).
Conclusion
Treatment with SEP−363856 was associated with continued improvement from open-label baseline in the PANSS total (−22.6) and BNSS total (−11.3) scores. The most frequently reported adverse events (= 5%) were schizophrenia, headache, insomnia and anxiety. SEP−363856 had minimal effects on weight, lipids, glycemic indices, prolactin, and was associated with minimal risk of extrapyramidal symptom.
The aim of this fixed-dose study was to evaluate the efficacy and safety of dasotraline in the treatment of patients with binge-eating disorder (BED).
Methods
Patients meeting Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition criteria for BED were randomized to 12 weeks of double-blind treatment with fixed doses of dasotraline (4 and 6 mg/d), or placebo. The primary efficacy endpoint was change in number of binge-eating (BE) days per week at week 12. Secondary efficacy endpoints included week 12 change on the BE CGI-Severity Scale (BE-CGI-S) and the Yale-Brown Obsessive–Compulsive Scale Modified for BE (YBOCS-BE).
Results
At week 12, treatment with dasotraline was associated with significant improvement in number of BE days per week on the dose of 6 mg/d (N = 162) vs placebo (N = 162; −3.47 vs −2.92; P = .0045), but not 4 mg/d (N = 161; −3.21). Improvement vs placebo was observed for dasotraline 6 and 4 mg/d, respectively, on the BE-CGI-S (effect size [ES]: 0.37 and 0.27) and on the YBOCS-BE total score (ES: 0.43 and 0.29). The most common adverse events on dasotraline were insomnia, dry mouth, headache, decreased appetite, nausea, and anxiety. Changes in blood pressure and pulse were minimal.
Conclusion
Treatment with dasotraline 6 mg/d (but not 4 mg/d) was associated with significantly greater reduction in BE days per week. Both doses of dasotraline were generally safe and well-tolerated and resulted in global improvement on the BE-CGI-S, as well as improvement in BE related obsessional thoughts and compulsive behaviors on the YBOCS-BE. These results confirm the findings of a previous flexible dose study.
SEP-363856 is a novel psychotropic agent that has shown broad efficacy in animal models of schizophrenia and depression. Its antipsychotic effects appear to be mediated by agonist activity at both trace amine-associated receptor 1 (TAAR1) and 5-HT1A receptors. Notably, SEP-363856 does not bind to any dopaminergic, serotonergic (except 5-HT1A), glutamatergic, or other neuroreceptors thought to mediate the effects of currently available antipsychotics. The aim of this study was to evaluate the efficacy and safety of SEP-363856 in acutely symptomatic patients with schizophrenia.
Method:
Patients aged 18-40 years meeting DSM-5 criteria for schizophrenia (PANSS total score ≥80) were randomized, double-blind, to 4-weeks of flexible-dose SEP-363856 (50 or 75 mg/d) or placebo. Efficacy measures included the Positive and Negative Syndrome Scale (PANSS) total score (primary), PANSS subscale scores, and the Clinical Global Impressions-Severity (CGI-S) score. Change from baseline in primary and secondary measures were analyzed using a mixed model for repeated measures (MMRM) analysis.
Results:
Study treatment groups were similar at baseline: SEP-363856 (N=120; male, 64.2%; mean age, 30.0 years; PANSS total score, 101.4) and placebo (N=125; male, 63.2%; mean age, 30.6 years; PANSS total score, 99.7). Least-squares (LS) mean reduction from baseline to week 4 was significantly greater for SEP-363856 vs. placebo on the PANSS total score (-17.2 vs. -9.7; P=0.001; effect size, 0.45), PANSS positive subscale score (-5.5 vs. -3.9; P=0.019; effect size, 0.32), PANSS negative subscale score (-3.1 vs. -1.6; P=0.008; effect size, 0.37), PANSS general psychopathology subscale score (-9.0 vs. -4.7; P<0.001; effect size, 0.51), and the CGI-Severity score (-1.0 vs. -0.5; P<0.001; effect size, 0.52). Discontinuation rates for SEP-363856 vs. placebo were similar overall (21.7% vs. 20.8%) and due to an adverse event (8.3% vs. 6.4%). Change in weight, lipids, glucose and prolactin was similar in SEP-363856 and placebo groups. Adverse events occurring with an incidence ≥2% on SEP-363856 or placebo (with SEP-363856 incidence higher than placebo) were: somnolence (6.7% vs. 4.8%), agitation (5.0% vs. 4.8%), nausea (5.0% vs. 3.2%), diarrhea (2.5% vs. 0.8%), and dyspepsia (2.5% vs. 0%). The proportion of patients who reported any extrapyramidal symptom was 3.3% on SEP-363856 and 3.2% on placebo.
Conclusion:
In this placebo-controlled study, treatment with SEP-363856, a novel psychotropic agent, was associated with statistically significant and clinically meaningful improvement in schizophrenia symptoms as demonstrated by endpoint change in PANSS total and subscale scores, and CGI-Severity scores. Safety and tolerability findings for SEP-363856 were in general similar to placebo. In particular, SEP-363856 was not associated with extrapyramidal symptoms, akathisia, or hyperprolactinemia, consistent with its non-D2 mechanism of action.
ClinicalTrials.gov:
NCT02969382
Funding Acknowledgements:
Supported by funding from Sunovion Pharmaceuticals Inc.
Dasotraline is a long-acting dopamine/norepinephrine reuptake inhibitor with a PK profile characterized by slow absorption and a t½ of 47-77 hours, permitting once-daily dosing. In a previous flexible dose study, dasotraline demonstrated significant efficacy in the treatment of binge-eating disorder (BED). The aim of this confirmatory fixed-dose study was to evaluate efficacy and safety of dasotraline in the treatment of patients with BED.
Methods:
Patients meeting DSM-5 criteria for BED were randomized to 12 weeks of double-blind treatment with dasotraline (4 mg/d or 6 mg/d), or placebo. The primary efficacy endpoint was change in number of binge-eating days per week at week 12. Secondary efficacy endpoints included changes at Week 12 on the Binge Eating Clinical Global Impression of Severity Scale (BE-CGI-S), the Yale-Brown Obsessive-Compulsive Scale Modified for Binge Eating (Y-BOCS-BE), and the proportion of patients with 100% cessation of binge-eating episodes during the final 4 weeks of treatment. Efficacy was assessed using an MMRM analysis (and a logistic regression model for cessation) with a pre-specified sequential testing procedure used to control overall type I error rate.
Results:
A total of 486 were in the ITT population (dasotraline 6 mg/d (N=162), 4 mg/d (N=161), or placebo (N=163). At week 12, treatment with dasotraline was associated with significant reduction in number of binge-eating days per week in the 6 mg/d group vs. placebo (-3.5 vs. -2.9; P=0.0045), but non-significant improvement in the 4 mg/d group vs. placebo (-3.2; P=0.12). Greater improvement was observed vs. placebo for dasotraline 6 mg/d and 4 mg/d, respectively, on the BE-CGI-S (P<0.01 and P<0.03) and the Y-BOC-BE (P<0.001 and P<0.02; all P-values were nominal, not adjusted for multiplicity). The proportion of patients who achieved 4-week cessation of binge-eating episodes was only significant for the dasotraline 6 mg in the completer population (P<0.05; post-hoc analysis) but was not significant for either dose of dasotraline vs. placebo when drop-outs were included in the analysis. The most common adverse events on dasotraline 6 mg/d and 4 mg/d were combined insomnia (early, middle, late), dry mouth, headache, decreased appetite, nausea, and anxiety. Changes in systolic and diastolic blood pressure were minimal. Mean baseline to endpoint changes in supine pulse rate on dasotraline 6 mg/d and 4 mg/d vs. placebo was +6.2 bpm and +4.8 vs. +0.2 bpm.
Conclusions:
In this 12-week, placebo-controlled, fixed-dose study, treatment with dasotraline 6 mg/d was associated with a significant reduction in frequency of binge-eating days per week; efficacy was not demonstrated for the 4 mg dose. Treatment with both doses of dasotraline resulted in improvement in the Y-BOCS-BE and the BE-CGI-S. Dasotraline was safe and generally well-tolerated at both doses; most common adverse events were insomnia, dry mouth and headache.
Clinicaltrials.gov: NCT03107026
Funding Acknowledgements:
Supported by funding from Sunovion Pharmaceuticals Inc.