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Data updated: May 26, 2026

METHADONE HYDROCHLORIDE INTENSOL (methadone hydrochloride)

Pain Approved 1988-09-06

Methadone Hydrochloride Injection is indicated for the management of severe and persistent pain in patients where alternative treatments, such as immediate-release opioids, are ineffective or poorly tolerated. It is also indicated for the temporary treatment of opioid dependence in hospitalized patients or those in clinical settings who are unable to take oral medication. Due to the risks of addiction, abuse, and fatal overdose, its

Source: FDA Label • Hikma

How METHADONE HYDROCHLORIDE INTENSOL Works

This drug works by acting as a mu-agonist, a synthetic opioid that targets the central nervous system and smooth muscle to produce effects similar to morphine. It provides a slower onset and more prolonged course than morphine, leading to a less severe abstinence syndrome during detoxification. Additionally, it may act as an antagonist at the NMDA receptor, though the specific therapeutic contribution of this action is unclear.

1
Indication
--
Phase 3 Trials
37
Years on Market

Details

Status
Prescription
First Approved
1988-09-06
Routes
ORAL
Dosage Forms
CONCENTRATE

Companies

Active Ingredient: METHADONE HYDROCHLORIDE

METHADONE HYDROCHLORIDE INTENSOL Approval History

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Original
New Indication
New Form
Label Update
38 FDA actions from 1988 to 2024
Oct 2024 SUPPL
Update · REMS
May 2024 SUPPL
Label · Labeling
Apr 2021 SUPPL
Mfg · Manufacturing (CMC)

What METHADONE HYDROCHLORIDE INTENSOL Treats

2 indications

METHADONE HYDROCHLORIDE INTENSOL is approved for 2 conditions since its original approval in 1988. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Pain
  • Opioid Dependence
Source: FDA Label

METHADONE HYDROCHLORIDE INTENSOL Boxed Warning

SERIOUS AND LIFE-THREATENING RISKS FROM USE OF METHADONE HYDROCHLORIDE INJECTION Addiction, Abuse, and Misuse Because the use of Methadone Hydrochloride Injection exposes patients and other users to the risks of opioid addiction, abuse, and misuse, which can lead to overdose and death, assess each patient’s risk prior to prescribing and reassess all patients regularly for the development of these behaviors and conditions (see WARNINGS ). Life-Threatening Respiratory Depression Serious, life-thre...

METHADONE HYDROCHLORIDE INTENSOL Competitive Set

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

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Clinical Trial Registry

10 trials
Trial Sponsor ID Phase Status Title
NCT06962306 OPAL-Cleft Pro00117598 Ph 4 recruiting Optimizing Perioperative Analgesia to Lower Pain Following Cleft Palate Surgery
NCT07226076 Pro00147447 Ph 3 recruiting Methadone in TKA for Post-op Pain and Opioid Reduction
NCT06877858 857972 Ph 1 recruiting MethaLoad Dose-Finding Study
NCT06086171 SHS-An-4-2023 Ph 4 completed Perioperative Methadone Compared to Placebo in Elderly Hip Fracture Patients
NCT05831345 CHUB-Methadone Ph 3 recruiting Intraoperative Methadone for the Prevention of Postoperative Pain
NCT04680286 METACEBO 23956082 2020-002945-41 Ph 3 terminated Intraoperative Methadone in Children Undergoing Surgery
NCT00930332 SC22 CAN-NCIC-SC22, CDR0000641372 Ph 1 terminated Methadone Hydrochloride as First-Line Therapy in Treating Patients With Chronic Neuropathic Cancer Pain
NCT02989597 MAPS results posted 2016-6985 Ph 4 terminated Intraoperative Methadone Administration for Improved Pain Control in Spinal Fusion Patients
NCT02531906 I 262314 NCI-2015-01338, I 262314 Ph 1 completed Gabapentin, Methadone Hydrochloride, and Oxycodone Hydrochloride in Improving Quality of Life in Patients With Stage II-IV Head and Neck Cancer During Chemoradiation
NCT01795495 results posted IRB13-0036 Active Ph 2 completed Methadone vs Magnesium in Spinal Fusion
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Active Pipeline

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Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

METHADONE HYDROCHLORIDE INTENSOL FDA Label Details

Indications & Usage

FDA Label (PDF)

METHADONE HYDROCHLORIDE INTENSOL is indicated for the treatment of Pain; Opioid Dependence.

⚠️ BOXED WARNING

WARNING: SERIOUS AND LIFE-THREATENING RISKS FROM USE OF METHADONE HYDROCHLORIDE INJECTION Addiction, Abuse, and Misuse Because the use of Methadone Hydrochloride Injection exposes patients and other users to the risks of opioid addiction, abuse, and misuse, which can lead to overdose and death, asse...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.