Intranasal nalmefene(Opiant Pharmaceuticals, Inc.) Drug Asset Due Diligence Report 2026: Clinical, IP, Market, Deals, and Go/No-Go
This Intranasal nalmefene(Opiant Pharmaceuticals, Inc.) Drug Asset Due Diligence Report was built with PatSnap Life Sciences MCP workflows. Drug & Asset MCP establishes identity, ownership and stage; Clinical Trials MCP checks design, endpoints and readouts; Company & Deal Intelligence MCP reconstructs transaction precedent. Explore the MCP servers used in this report.
Decision date: 18 September 2026. Currency fields are presented in US$ millions as returned by the deal dataset. This is a screening memorandum, not legal, medical, patent or investment advice.
Executive recommendation: CONDITIONAL GO
Decision memo
Advance with milestone-based economics while efficacy durability, safety differentiation, patent scope, and market positioning are validated.
The central underwriting question is whether Intranasal nalmefene(Opiant Pharmaceuticals, Inc.) can convert its Small molecule drug profile and Opioid receptors biology into clinically meaningful differentiation while preserving an investable safety, IP and commercial position.
1. Asset identity and development status
| Asset | Intranasal nalmefene(Opiant Pharmaceuticals, Inc.) (query alias: Intranasal nalmefene(Opiant Pharmaceuticals, Inc.)) |
|---|---|
| Modality / target | Small molecule drug; Opioid receptors; Opioid receptors antagonists |
| Highest global status | Phase 2 |
| Originator | Opiant Pharmaceuticals, Inc. |
| Active developers | Opiant Pharmaceuticals, Inc. |
The MCP disease footprint includes Opioid-Related Disorders. The highest-phase flag is a useful orientation point, but the licensing case depends on indication-level evidence and rights, not the global label alone.
2. Clinical program: design and endpoint audit
| Registry | Phase | Status | Enrollment | Lead primary endpoint |
|---|---|---|---|---|
| NCT07543276 | Phase 1 | Completed | 13 | Primary endpoint not disclosed in English source |
| JPRN-jRCTs061250103 | Not Applicable | Recruiting | 80 | Primary endpoint not disclosed in English source |
| ChiCTR2500114019 | Not Applicable | Recruiting | 48 | Primary endpoint not disclosed in English source |
The trial set should be diligenced for randomization, comparator relevance, endpoint hierarchy, analysis population, multiplicity, geographic mix and readout timing. For early-stage studies, safety and dose selection can be as decision-critical as response rate.
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3. Clinical readouts: what is known
Efficacy of low-dose nalmefene on recovery from general anaesthesia in adult patients: a multicentre randomised controlled study
Phase 4; n=514; evaluation: Positive. Reported fields: Time at Montreal cognitive assessment score ≥5 = 20.0 Minute ( 15.9); Time at Montreal cognitive assessment score ≥5 = 27.0 Minute ( 20.5)
A Two-part Open Label Study of the Pharmacodynamic Effects of Intranasal Nalmefene Compared to Intranasal Naloxone in Healthy Volunteers Under Steady State Opioid Agonism
Phase 1; n=84; evaluation: Not stated in English source. Reported fields: Change in Minute Ventilation(Mean) = 3.432 L/min ; Change in Minute Ventilation(Mean) = 5.744 L/min
A Study to Characterize the Time Course of Reversal of Opioid (Fentanyl)-Induced Respiratory Depression Following Administration of Nalmefene Autoinjector 1.5 mg (0.94% MgCl2) Intramuscular and Narcan® 4 mg Intranasal in Healthy Subjects
Phase 1; n=24; evaluation: Not stated in English source. Reported fields: Change in Minute Ventilation 5 Minutes From Opioid Induced Nadir(Mean) = 4.42 L/min ; Change in Minute Ventilation 5 Minutes From Opioid Induced Nadir(Mean) = 2.03 L/min
These fields are structured evidence signals, not a substitute for statistical review. The next diligence pass should reconcile denominators, confidence intervals, follow-up, censoring, dose cohorts and treatment-emergent toxicity against the original abstract, registry and protocol.
4. Market and competitive position
Intranasal nalmefene(Opiant Pharmaceuticals, Inc.) addresses Opioid-Related Disorders. Commercial attractiveness rests on addressable patients, treatment-line placement, duration, administration burden, pricing and displacement of entrenched standards. The modality—Small molecule drug—must demonstrate a benefit large enough to offset class-specific safety and operational costs.
The MCP screen returned 6 matched transaction record(s) under the scope “asset-specific.” Partner activity is a market-validation signal, but it does not establish net present value.
5. Transaction precedent and economics
| Date | Transaction | Phase at deal | Disclosed economics |
|---|---|---|---|
| 2023-09-11 | Hillstream Enters into an Exclusive Option Agreement to Acquire a Clinical Stage Asset for Chronic Pruritis | Phase 2 | Financial terms not disclosed |
| 2022-11-14 | Indivior Completes Acquisition of Opiant Pharmaceuticals, Inc. | Preclinical | US$145.0M stated total |
| 2013-10-31 | Otsuka Named as Lundbeck's Partner in Japan on Nalmefene for the Reduction of Alcohol Consumption | Approved | Financial terms not disclosed |
Headline values are not directly comparable. Diligence should normalize upfront cash, equity, development and sales milestones, tiered royalties, opt-in mechanics, cost sharing, change-of-control clauses and geography.
6. IP and freedom-to-operate screen
The milestone feed surfaced a patent-application signal described as “The fault recovery of the gastrointestinal active action”. The milestone feed surfaced a patent-application signal described as “17-Substituted 6-desoxy-7,8-dihydro-6-alpha-methylnoroxymorphone narcotic antagonists”. The milestone feed surfaced a patent-application signal described as “6-methylene-6-desoxy dihydro morphine and codeine derivatives and pharmaceutically acceptable salts”.
The claim chart should separately test composition or sequence coverage, formulation and dosing, indication and biomarker claims, combinations, manufacturing know-how, prosecution history, term extensions and third-party blocking rights.
7. Principal risks and diligence gates
- Therapeutic index and off-target toxicity
- Resistance biology and biomarker-defined patient selection
- Differentiation from established and emerging standards
Cross-functional diligence should also test CMC comparability, supply chain, pharmacovigilance, regulatory correspondence, data integrity, investigator concentration, partner obligations and change-of-control restrictions.
8. Final go/no-go memorandum
CONDITIONAL GO
Advance with milestone-based economics while efficacy durability, safety differentiation, patent scope, and market positioning are validated.
Required pre-signing gates: reproduce key efficacy analyses; complete an indication-specific safety review; run a full patent-family and freedom-to-operate search; model risk-adjusted economics by territory; and reconcile all rights, sublicenses and encumbrances.
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Data provenance: PatSnap Drug & Asset MCP, Clinical Trials MCP, and Company & Deal Intelligence MCP; accessed 2026-09-18. Counts and status fields may change as source records update.
