Product image of Metadon Nordic Drugs (Methadone Hydrochloride) supplied by GNH India

Metadon Nordic Drugs

Active Ingredient:
Methadone Hydrochloride
Origin:
EU

Metadon Nordic Drugs (Methadone Hydrochloride)

Methadone Hydrochloride, the active ingredient in Metadon, is an opioid agonist presented as an oral formulation for oral use. It is employed in the management of opioid dependence and chronic pain, providing analgesia and reducing withdrawal symptoms in patients requiring long‑term opioid therapy.

GNH India supplies Metadon as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Nordic Drugs Ab

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Indications & Clinical Uses

Metadon is an opioid agonist used in the treatment of conditions related to opioid pathways and chronic pain management.

  • Opioid dependence: suppresses withdrawal symptoms and supports maintenance therapy.
  • Chronic pain: provides long‑acting analgesia for severe, persistent pain.
  • Opioid substitution therapy: stabilizes opioid levels to reduce illicit opioid use.

How It Works

  • Methadone Hydrochloride acts as a full agonist at the mu‑opioid receptors in the central nervous system. By binding to these receptors, it produces analgesia and diminishes the physiological response to opioid withdrawal, while also exhibiting NMDA receptor antagonism that may contribute to its efficacy in chronic pain and dependence treatment.

Side Effects

Methadone may cause a range of adverse reactions, from mild to severe, which should be monitored during therapy.

Common Side Effects

  • Constipation: reduced gastrointestinal motility.
  • Nausea or vomiting: gastrointestinal upset.
  • Drowsiness or sedation: central nervous system depression.
  • Sweating: increased perspiration.
  • Dry mouth: reduced salivary flow.
  • Weight gain: increased appetite.

Serious or Rare Side Effects

  • Respiratory depression: slowed breathing, potentially life‑threatening.
  • Cardiac arrhythmias: QT interval prolongation leading to torsades de pointes.
  • Severe allergic reactions: rash, itching, swelling, or anaphylaxis.

Precautions & Warnings

Before initiating Metadon therapy, several safety considerations are essential.

  • Assess cardiac history: evaluate risk of QT prolongation.
  • Review liver function: adjust use in hepatic impairment.
  • Monitor for respiratory depression: especially in opioid‑naïve patients.
  • Avoid abrupt discontinuation: taper dose to prevent withdrawal.
  • Store at ambient temperature: keep below 25°C in the original container, protect from moisture and light.

Avoid Interactions

Methadone interacts with several drug classes that can alter its safety or effectiveness.

Major Interactions (Avoid)

  • MAO inhibitors: risk of severe serotonin syndrome.
  • CNS depressants (e.g., benzodiazepines, barbiturates): heightened respiratory depression.
  • QT‑prolonging agents (e.g., certain antiarrhythmics, antipsychotics): increased risk of cardiac arrhythmias.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inhibitors (e.g., erythromycin, ketoconazole): may raise methadone levels.
  • CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce efficacy.
  • Antidepressants (e.g., SSRIs, SNRIs): monitor for additive serotonergic effects.

Frequently Asked Questions

Metadon contains methadone hydrochloride and is prescribed to treat opioid dependence and to provide long‑acting analgesia for chronic pain. It helps suppress withdrawal symptoms in patients undergoing opioid substitution therapy and manages severe, persistent pain where other analgesics may be insufficient.

Methadone hydrochloride works by binding to mu‑opioid receptors in the brain and spinal cord, acting as a full agonist. This activation produces analgesia and reduces the physiological response to opioid withdrawal. Its additional NMDA receptor antagonism may also contribute to pain control and reduce tolerance development.

The appropriate dose of Metadon is individualized and determined by the prescribing clinician based on the patient’s medical condition, opioid tolerance, and response to therapy. Dosage adjustments are made during treatment to achieve optimal control of withdrawal symptoms or pain while minimizing adverse effects.

Safety data for methadone use in pregnancy and lactation are limited, and the medication should only be used if the potential benefits outweigh the risks. Pregnant or nursing patients must discuss treatment options with their healthcare provider, who can assess maternal and fetal considerations and monitor closely.

To request Metadon, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, verifying trade or institutional credentials before providing pricing, availability, shipping details, and any necessary import documentation.

Metadon is a long‑acting full mu‑opioid receptor agonist, offering once‑daily dosing and stable plasma levels, which can be advantageous over shorter‑acting agents like buprenorphine that act as partial agonists. Its pharmacokinetic profile may provide smoother withdrawal suppression, but individual response and safety considerations guide therapy choice.

Metadon should be stored at ambient temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the product out of reach of children and do not store in bathrooms or other humid environments.

Metadon is administered orally, typically as a tablet or liquid formulation, as directed by the prescribing clinician. The medication should be taken with or without food according to the healthcare provider’s instructions, and the dose may be adjusted gradually to achieve therapeutic goals.

The most serious risks include respiratory depression, especially when combined with other central nervous system depressants, and cardiac arrhythmias due to QT interval prolongation. Patients should be monitored for signs of slowed breathing, dizziness, or irregular heart rhythms, and any concerning symptoms should be reported promptly.

Metadon is contraindicated in individuals with known hypersensitivity to methadone or any component of the formulation, in patients taking monoamine oxidase inhibitors, and in those with significant uncontrolled cardiac arrhythmias or severe respiratory insufficiency. Clinicians must evaluate each patient’s medical history before initiating therapy.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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