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

Metadon Viatris

Active Ingredient:
Methadone Hydrochloride
Origin:
EU

Metadon Viatris (Methadone Hydrochloride)

Methadone, the active ingredient in Metadon Viatris, is an opioid analgesic presented as an injectable solution for intramuscular or subcutaneous use. It is employed in the management of opioid dependence and chronic pain in adult patients.

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

Manufacturer / TM Owner

Viatris Ab

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Indications & Clinical Uses

  • Metadon Viatris is an opioid agonist used in the following clinical situations:
  • Opioid dependence: facilitates withdrawal management and maintenance therapy.
  • Chronic pain: provides long‑acting analgesia for severe, persistent pain.
  • Opioid substitution therapy: maintains opioid tolerance while reducing illicit opioid use.

How It Works

  • Methadone acts as a full agonist at the mu‑opioid receptor, binding with high affinity and producing analgesia and opioid substitution effects. It also blocks NMDA receptors and inhibits serotonin and norepinephrine reuptake, contributing to its utility in chronic pain and withdrawal mitigation. The combined actions reduce neuronal excitability and modulate pain pathways.

Side Effects

Methadone may cause a range of adverse reactions. Monitoring and patient education are essential.

Common Side Effects

  • Nausea
  • Constipation
  • Drowsiness or sedation
  • Sweating
  • Dizziness
  • Dry mouth

Serious or Rare Side Effects

  • Respiratory depression
  • QT interval prolongation leading to arrhythmia
  • Severe hypotension
  • Seizures
  • Anaphylactic or severe allergic reactions
  • Adrenal insufficiency

Precautions & Warnings

  • When prescribing or dispensing Metadon Viatris, consider the following precautions:
  • Assess respiratory function: evaluate baseline breathing status before initiation.
  • Monitor cardiac status: obtain baseline ECG to assess QT interval.
  • Avoid abrupt discontinuation: taper dose under medical supervision to prevent withdrawal.
  • Use cautiously in hepatic impairment: dose reduction may be required.
  • Pregnancy considerations: Category C; weigh maternal benefits against fetal risks.
  • Store at room temperature: keep in original container, protect from moisture and light.

Avoid Interactions

Methadone can interact with several drug classes, requiring careful management.

Major Interactions (Avoid)

  • CYP3A4 inhibitors: may raise methadone plasma concentrations.
  • Concomitant CNS depressants (e.g., benzodiazepines, barbiturates): increase risk of respiratory depression.
  • QT‑prolonging agents: additive risk of cardiac arrhythmias.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers: may reduce methadone effectiveness.
  • Other opioids: may require dose adjustments to avoid additive effects.
  • Selective serotonin reuptake inhibitors (SSRIs): potential for serotonin syndrome.

Frequently Asked Questions

Metadon Viatris contains methadone and is indicated for the treatment of opioid dependence, including withdrawal management and maintenance therapy, as well as for the control of severe chronic pain in adult patients when other analgesics are insufficient.

Methadone is a full agonist at the mu‑opioid receptor, producing analgesia and reducing cravings. It also blocks NMDA receptors and inhibits the reuptake of serotonin and norepinephrine, which helps alleviate withdrawal symptoms and provides long‑lasting pain relief.

The dose of Metadon Viatris is individualized. A qualified prescriber determines the appropriate amount based on the patient’s clinical condition, prior opioid exposure, and response to therapy, and adjusts it as needed during treatment.

Methadone is classified as Pregnancy Category C, meaning risk cannot be ruled out. It may be used if the potential benefit justifies the risk. Breastfeeding is possible, but infants should be monitored for sedation and respiratory depression, and decisions should be made with a healthcare professional.

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

The primary alternative for opioid dependence is buprenorphine, a partial mu‑opioid agonist. Methadone provides full receptor activation and a longer half‑life, which can be advantageous for stable maintenance but carries higher risk of respiratory depression and cardiac effects compared with buprenorphine.

Metadon Viatris should be stored at room temperature, below 25 °C, in its original packaging. Protect the product from moisture, direct sunlight, and extreme temperatures to maintain potency and sterility.

The medication is supplied as an injectable solution and is administered by a healthcare professional via intramuscular or subcutaneous injection, typically in a clinical setting where dosing can be accurately measured and monitored.

The most critical risks include respiratory depression, especially when combined with other depressants, QT interval prolongation that may lead to arrhythmias, severe hypotension, and the potential for overdose. Patients should be closely monitored during initiation and dose adjustments.

Metadon Viatris is contraindicated in individuals with known hypersensitivity to methadone, severe respiratory depression, acute asthma attacks, or uncontrolled severe cardiac disease. Caution is also advised for patients with significant hepatic impairment or those taking interacting medications.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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