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

Methasan

Active Ingredient:
Methadone Hydrochloride
Origin:
EU

Methasan (Methadone Hydrochloride)

Methadone, the active ingredient in Methasan, is a synthetic opioid presented as an oral tablet for oral use. It is indicated for the treatment of opioid dependence and for the management of chronic pain in adult patients, providing long‑acting analgesic control.

GNH India supplies Methasan as a licensed, Good Distribution Practice‑compliant pharmaceutical product, delivering to hospitals, pharmacies and clinics worldwide through regulated channels and supporting import documentation for international markets. The company adheres to stringent quality standards and provides technical assistance for safe handling.

Manufacturer / TM Owner

G.L. Pharma Gmbh

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Indications & Clinical Uses

  • Methadone is a synthetic opioid used in the management of opioid dependence and chronic pain.
  • Opioid dependence: reduces withdrawal symptoms and cravings, supporting maintenance therapy.
  • Chronic pain: provides long‑acting analgesia for persistent moderate to severe pain.
  • Detoxification: facilitates supervised opioid tapering in clinical settings.
  • Palliative care: offers sustained pain relief for terminal patients.

How It Works

  • Methadone acts as a full agonist at the mu‑opioid receptor, binding to neuronal receptors in the central nervous system. This activation inhibits the release of excitatory neurotransmitters, dampening pain signal transmission and reducing the perception of pain. Its long half‑life also stabilizes opioid receptor activity, helping to mitigate withdrawal symptoms in dependent individuals.

Side Effects

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

Common Side Effects

  • Nausea: mild to moderate stomach upset.
  • Constipation: reduced bowel motility.
  • Dizziness: feeling light‑headed or unsteady.
  • Sweating: excessive perspiration.
  • Drowsiness: increased sleepiness.
  • Dry mouth: reduced salivation.

Serious or Rare Side Effects

  • Respiratory depression: slowed breathing that can be life‑threatening.
  • QT interval prolongation: risk of cardiac arrhythmias.
  • Severe hypotension: marked drop in blood pressure.
  • Adrenal insufficiency: impaired cortisol production.
  • Seizures: rare convulsive episodes.

Precautions & Warnings

  • When prescribing Methasan, clinicians should observe several safety measures.
  • Dose titration: adjust gradually under medical supervision to minimize overdose risk.
  • Cardiac monitoring: obtain baseline ECG and monitor QT interval.
  • Drug dependence: assess for potential misuse before initiating therapy.
  • Pregnancy and lactation: evaluate risks versus benefits; use only if clearly needed.
  • Concomitant CNS depressants: avoid or use with caution due to additive respiratory depression.
  • Store at ambient temperature: keep below 25°C, in original container, protect from moisture and light.

Avoid Interactions

Methasan can interact with several medications; awareness of interaction severity guides clinical decisions.

Major Interactions (Avoid)

  • CYP3A4 inhibitors (e.g., ketoconazole): may increase methadone plasma levels, risk of toxicity.
  • QT‑prolonging agents (e.g., quinidine): additive risk of cardiac arrhythmia.
  • Respiratory depressants (e.g., benzodiazepines): synergistic respiratory depression.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers (e.g., rifampin): may reduce effectiveness.
  • Anticholinergics: may worsen constipation.
  • Alcohol: can enhance sedative effects.

Frequently Asked Questions

Methasan contains methadone hydrochloride and is prescribed for two primary purposes: managing opioid dependence by reducing withdrawal symptoms and cravings, and providing long‑acting analgesia for chronic pain conditions that require sustained opioid therapy.

Methadone works by binding to and activating mu‑opioid receptors in the central nervous system. This activation blocks pain signals and stabilizes opioid receptor activity, which helps to alleviate pain and diminish the physiological drive for opioid withdrawal.

The appropriate dose of Methasan is individualized and must be determined by a qualified prescriber. Dosing depends on factors such as the patient’s clinical condition, prior opioid exposure, metabolic profile, and response to therapy.

Safety data for methadone in pregnancy and lactation are limited. It may be used when the therapeutic benefit outweighs potential risks, but clinicians should carefully assess each case and monitor both mother and infant closely.

To order Methasan, 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.

Methasan (methadone) offers a longer half‑life than many short‑acting opioids, allowing once‑daily dosing for maintenance therapy. Compared with buprenorphine, methadone provides full mu‑opioid receptor agonism, which can be more effective for severe dependence but carries a higher risk of respiratory depression and requires stricter monitoring.

Methasan should be stored at ambient temperature, preferably below 25 °C, in its original packaging. Protect the product from moisture, light, and excessive heat to maintain potency and stability throughout its shelf life.

Methasan is supplied as an oral tablet and should be swallowed whole with water. It is taken by mouth according to the prescriber’s instructions, typically once daily, but dosing frequency may vary based on individual therapeutic needs.

The most critical risks include respiratory depression, which can be life‑threatening, and cardiac arrhythmias due to QT interval prolongation. Overdose, severe hypotension, and rare cases of adrenal insufficiency also require immediate medical attention.

Methasan is contraindicated in individuals with known hypersensitivity to methadone, those with significant respiratory compromise, uncontrolled severe asthma, or a history of prolonged QT interval. Caution is also advised for patients with severe hepatic impairment or concurrent use of other potent CNS depressants.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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