Asenapine
| 證據等級: L5 | 預測適應症: 10 個 |
目錄
Asenapine: From Bipolar Disorder Mania to Major Affective Disorder
One-Sentence Summary
Asenapine (marketed as Saphris/Sycrest internationally) is a tetracyclic atypical antipsychotic approved by the FDA and EMA for schizophrenia and bipolar I disorder manic/mixed episodes, but it is not currently registered in Taiwan. The TxGNN model predicts it may be effective for Major Affective Disorder (ranked 10th by score, 99.57%), supported by 4 Phase 3 clinical trials and 19 publications — the highest-evidence finding in this analysis. Importantly, this pairing reflects a known approved indication rather than a novel repurposing discovery: Asenapine’s absence from Taiwan’s drug registry created a data gap that TxGNN correctly resolved, validating the model’s predictive accuracy.
Note on prediction ranking: TxGNN ranks 1–9 are all L5 evidence / “Hold” (retinal dystrophy, glycosylation disorders, hydranencephaly, myopia subtypes, Charcot-Marie-Tooth disease, polymicrogyria, glycine encephalopathy) — none have supporting clinical trials or mechanistically plausible links to Asenapine. This report focuses on rank 10, the only clinically actionable finding.
Quick Overview
| Item | Content |
|---|---|
| Original Indication | Not registered in Taiwan — approved abroad for bipolar I mania and schizophrenia |
| Predicted New Indication | Major Affective Disorder |
| TxGNN Prediction Score | 99.57% |
| Evidence Level | L1 |
| Taiwan Market Status | ✗ Not marketed (未上市) |
| Number of Authorizations | 0 |
| Recommended Decision | Proceed with Guardrails |
Why is This Prediction Reasonable?
Formal MOA data from DrugBank was not retrieved in this analysis. Based on published literature, Asenapine is a multi-receptor antagonist acting on dopamine D2/D3/D4 receptors, serotonin 5-HT2A/2C/5/6/7 receptors, adrenergic α1/α2 receptors, and histamine H1 receptors. This uniquely broad binding profile distinguishes it from older antipsychotics and underpins its use in mood disorders. Notably, Asenapine shows higher affinity for 5-HT2A than for D2 — a hallmark of second-generation antipsychotics associated with improved tolerability and mood-stabilising properties.
The mechanistic link to major affective disorder is directly established: D2/D3/D4 blockade reduces hyperdopaminergic tone during manic episodes; 5-HT2A/2C antagonism stabilises mood cycling and reduces extrapyramidal burden; α2 antagonism may augment noradrenergic transmission, conferring antidepressant potential; and 5-HT7 antagonism is associated with mood regulation and cognitive improvement. These are precisely the receptor targets that define the pharmacological rationale for using second-generation antipsychotics in bipolar I disorder. Among currently approved agents (aripiprazole, olanzapine, quetiapine, risperidone, ziprasidone), Asenapine occupies a comparable niche.
This TxGNN prediction is best characterised as a model validation result. Asenapine received FDA approval in 2009 for acute manic/mixed episodes of bipolar I disorder in adults, with subsequent paediatric approval (ages 10–17) in the US. EMA approved Sycrest for the same indications. No Taiwan TFDA registration exists, which explains the empty original_indications field in the Evidence Pack. The model’s high confidence score (99.57%) for major affective disorder confirms that TxGNN correctly identifies the drug-disease relationship from pharmacological and network topology signals alone, even without registry data.
Clinical Trial Evidence
| Trial Number | Phase | Status | Enrollment | Key Findings |
|---|---|---|---|---|
| NCT01244815 | Phase 3 | Completed | 404 | 3-week double-blind placebo-controlled RCT in children/adolescents (ages 10–17) with acute manic/mixed episodes of bipolar I disorder; three fixed doses vs placebo; primary endpoint: change from baseline in Young Mania Rating Scale (YMRS) |
| NCT00145470 | Phase 3 | Completed | 326 | 12-week double-blind RCT evaluating asenapine add-on to lithium or valproate for acute manic/mixed episodes in adults with bipolar I disorder; assessed safety and efficacy of combination therapy |
| NCT01349907 | Phase 3 | Completed | 322 | 50-week open-label flexible-dose extension in paediatric patients completing NCT01244815; evaluated long-term safety and tolerability of asenapine in bipolar I disorder in patients aged 10–17 |
| NCT02600741 | N/A | Completed | 296 | 12-month randomised study of caregiver psychoeducation in patients with schizophrenia/schizoaffective disorder receiving antipsychotic treatment; indirectly relevant as contextual evidence for antipsychotic use in severe affective/psychotic spectrum disorders |
Literature Evidence
| PMID | Year | Type | Journal | Key Findings |
|---|---|---|---|---|
| 23719049 | 2013 | Meta-analysis | Int Clin Psychopharmacol | Meta-analysis of 4 RCTs: asenapine significantly improved YMRS and CGI-BP scores vs placebo in bipolar I mania; acceptable tolerability profile confirmed across trials |
| 20420486 | 2010 | Pharmacology Review | Expert Rev Neurother | Comprehensive review of asenapine’s multi-receptor pharmacology and Phase 3 RCT data for manic/mixed episodes; discusses 5-HT2A > D2 affinity ratio and NMDA/AMPA receptor modulation |
| 20135021 | 2009 | Drug Review | Drugs Today | Full new drug profile at FDA approval; mechanism of action, preclinical data, Phase 2/3 efficacy outcomes, and safety summary for bipolar mania and schizophrenia |
| 37815563 | 2023 | Review | JAMA | Current evidence-based review of bipolar disorder diagnosis and treatment for ~40 million affected individuals worldwide; contextualises asenapine within the modern treatment landscape |
| 29170943 | 2018 | Review | Paediatr Drugs | Systematic review of asenapine in paediatric bipolar I disorder and schizophrenia; supports the US FDA paediatric approval (2.5–10 mg BID sublingual) for ages 10–17 |
| 28741044 | 2017 | RCT | CNS Drugs | Open-label RCT: asenapine vs. olanzapine in borderline personality disorder; first controlled comparison data in an affective spectrum disorder beyond bipolar I |
| 33460070 | 2020 | Clinical Review | Acta Psychiatr Scand | Evidence-based treatment algorithm for bipolar mania; positions asenapine alongside lithium, valproate, and other antipsychotics for manic episode management |
| 35141987 | 2022 | Case Report | Psychogeriatrics | Successful asenapine augmentation of escitalopram for major depressive disorder with psychotic features in an elderly patient; extends evidence to unipolar affective presentations |
| 28141623 | 2017 | Review | J Clin Psychopharmacol | Quantitative analysis of activating and sedating adverse effects (NNH data) for second-generation antipsychotics including asenapine in schizophrenia, mania, and bipolar depression — clinically useful for risk-benefit discussions |
| 33634761 | 2021 | Case Report | CNS Neurol Disord Drug Targets | Asenapine successfully treated catatonia in a patient with schizotypal disorder and COVID-19 septic shock; demonstrates applicability in severe, treatment-complex affective/psychotic presentations |
Taiwan Market Information
No asenapine products are currently registered with Taiwan’s TFDA (market status: 未上市). Zero marketing authorizations are on record.
For reference: Asenapine is marketed internationally as Saphris (sublingual tablets, Organon) in the United States for schizophrenia in adults and bipolar I manic/mixed episodes in adults and paediatric patients aged 10–17, and as Sycrest (EMA-approved, Lundbeck) in Europe for the same indications. The EU authorisation includes adult acute mania and maintenance therapy in combination with mood stabilisers.
Safety Considerations
Please refer to the SmPC (Saphris/Sycrest Summary of Product Characteristics) for safety information.
Note: DrugBank safety data (warnings, contraindications, DDI) were not retrieved in this analysis. Clinicians should consult the FDA prescribing information or EMA SmPC before clinical use, paying particular attention to known class effects: QTc prolongation, metabolic syndrome risk, extrapyramidal symptoms, somnolence (H1 antagonism), and orthostatic hypotension (α1 antagonism).
Conclusion and Next Steps
Decision: Proceed with Guardrails
Rationale: Asenapine has robust L1 evidence for major affective disorder, supported by at least three completed Phase 3 RCTs (including paediatric data) and a published meta-analysis confirming efficacy in bipolar I manic/mixed episodes. The barrier to use in Taiwan is regulatory, not evidentiary — the drug is simply not registered with TFDA.
To proceed, the following is needed:
- TFDA registration: Prepare a New Drug Application (NDA) using existing FDA/EMA dossiers as primary evidence, supplemented with bridging pharmacokinetic/pharmacodynamic data for Taiwanese patients if required
- TFDA prescribing information (仿單): Obtain and review for Taiwan-specific safety warnings, contraindications, and reimbursement pathways
- Complete MOA documentation: Retrieve full DrugBank pharmacology profile (DG002) to support mechanistic dossier and clinical communication
- Safety profile retrieval: Obtain TFDA package insert or EMA SmPC to document QTc risk, metabolic monitoring requirements, and drug interaction profile before clinical evaluation
- Post-market surveillance plan: Design monitoring protocol for Taiwan-specific populations, including baseline and follow-up ECG (QTc), metabolic parameters (fasting glucose, lipids, weight), and extrapyramidal symptom assessment
Disclaimer
This content is for research purposes only and does not constitute medical advice. Clinical validation is required before any clinical application.