Product image of Misyo (Methadone Hydrochloride) supplied by GNH India

Misyo

Active Ingredient:
Methadone Hydrochloride
Origin:
EU

Misyo (Methadone Hydrochloride)

Methadone, the active ingredient in Misyo, is an opioid presented as an oral formulation for oral use. It is used to treat opioid dependence and manage chronic pain in adult patients.
GNH India supplies Misyo as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Inn-Farm D.O.O.

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Indications & Clinical Uses

Methadone is employed in the management of opioid‑related disorders and pain, acting on central nervous system opioid receptors.

  • Opioid dependence: helps maintain stable opioid levels and reduces cravings.
  • Opioid withdrawal: alleviates withdrawal symptoms during detoxification.
  • Chronic pain: provides long‑acting analgesia for severe, persistent pain.

How It Works

  • Methadone acts as a full agonist at the µ‑opioid receptor, binding with high affinity to produce analgesia and suppress withdrawal symptoms. It also blocks NMDA receptors and inhibits serotonin and norepinephrine reuptake, contributing to its efficacy in pain control and opioid substitution therapy.

Side Effects

Methadone may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

  • Nausea: upset stomach and possible vomiting.
  • Constipation: reduced bowel movements requiring monitoring.
  • Sweating: excessive perspiration, especially at higher doses.
  • Drowsiness: feeling unusually sleepy or fatigued.

Serious or Rare Side Effects

  • Respiratory depression: slowed breathing that can be life‑threatening.
  • QT interval prolongation: cardiac rhythm changes that may lead to arrhythmia.
  • Severe hypotension: marked drop in blood pressure causing dizziness or fainting.

Precautions & Warnings

When prescribing methadone, clinicians should consider several safety measures to minimize risk.

  • Assess patient history: evaluate prior opioid use, tolerance, and comorbid conditions.
  • Monitor respiratory function: watch for depression, especially during initiation or dose changes.
  • Avoid use in severe hepatic impairment: liver dysfunction can increase drug levels.
  • Pregnancy considerations: use only if benefits outweigh potential risks to the fetus.
  • Store at ambient temperature: keep in the original container, protect from moisture and light.

Avoid Interactions

Methadone can interact with other medicines, altering its effects or increasing toxicity.

Major Interactions (Avoid)

  • CNS depressants: may cause profound respiratory depression.
  • QT‑prolonging agents: increase risk of cardiac arrhythmia.
  • CYP3A4 inhibitors: can raise methadone plasma concentrations.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers: may reduce methadone effectiveness.
  • Serotonergic drugs: risk of serotonin syndrome when combined.

Frequently Asked Questions

Misyo contains methadone hydrochloride and is used primarily for opioid dependence treatment and for managing chronic, severe pain. It helps stabilize opioid levels, reduces cravings, and alleviates withdrawal symptoms while providing long‑acting analgesia.

Methadone works by binding to µ‑opioid receptors in the brain and spinal cord, acting as a full agonist. This activation produces analgesia and suppresses withdrawal symptoms. Additional actions include NMDA receptor antagonism and inhibition of serotonin and norepinephrine reuptake, which enhance its therapeutic profile.

The appropriate dose of Misyo is individualized and set by a qualified prescriber based on the patient’s clinical condition, prior opioid exposure, and response to therapy. Dosing regimens are tailored during treatment initiation and adjusted as needed.

Methadone is classified as Pregnancy Category C, indicating that it should be used only if the potential benefit justifies the potential risk to the fetus. It is excreted in breast milk, so breastfeeding decisions should be made in consultation with a healthcare professional.

To order Misyo, 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.

Methadone, the active ingredient in Misyo, offers a longer half‑life than short‑acting opioids like morphine, allowing once‑daily dosing for maintenance therapy. Compared with buprenorphine, methadone provides full µ‑receptor agonism, which can be advantageous for patients with high opioid tolerance, though it requires more stringent monitoring.

Misyo should be stored at ambient temperature, below 25 °C, in its original packaging. Keep the product away from moisture, direct sunlight, and excessive heat to maintain its stability and potency.

Misyo is administered orally, typically as a tablet or liquid formulation, as directed by the prescribing clinician. The exact route (swallow whole, dissolve, or mix with food) depends on the specific product presentation and the patient’s ability to take oral medication.

The most serious risks include respiratory depression, which can be life‑threatening, especially during dose escalation or when combined with other CNS depressants. Cardiac effects such as QT interval prolongation and severe hypotension are also critical concerns that require monitoring.

Misyo should be avoided in patients with known hypersensitivity to methadone, severe respiratory insufficiency, uncontrolled cardiac arrhythmias, or those taking contraindicated medications that could cause dangerous interactions. Clinicians must assess each patient’s medical history before initiating therapy.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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