Product image of Methadone Sugar Free Thornton & Ross (Methadone Hydrochloride) supplied by GNH India

Methadone Sugar Free Thornton & Ross

Active Ingredient:
Methadone Hydrochloride
Origin:
EU

Methadone Sugar Free Thornton & Ross (Methadone Hydrochloride)

Methadone, the active ingredient in Methadone Sugar Free Thornton & Ross, is a synthetic opioid presented as an oral tablet for oral use. It is used to treat opioid dependence and manage chronic pain in adults.

GNH India supplies Methadone Sugar Free Thornton & Ross as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Thornton & Ross Ltd

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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 severe, persistent pain.
  • Opioid detoxification: facilitates supervised withdrawal by stabilising opioid receptors.

How It Works

  • Methadone acts as a full agonist at the mu‑opioid receptors in the central nervous system, producing analgesia and suppressing withdrawal by mimicking the effects of endogenous opioids. It also blocks the reuptake of serotonin and norepinephrine, contributing to its analgesic profile and stabilising mood during opioid substitution therapy.

Side Effects

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

Common Side Effects

  • Nausea
  • Constipation
  • Drowsiness
  • Sweating
  • Dry mouth
  • Headache

Serious or Rare Side Effects

  • Respiratory depression
  • QT interval prolongation
  • Severe hypotension
  • Adrenal insufficiency
  • Seizures
  • Allergic reactions such as rash or angioedema

Precautions & Warnings

When prescribing methadone, several safety considerations should be observed.

  • Respiratory disease: assess risk of respiratory depression.
  • Cardiac monitoring: evaluate QT interval, especially with other QT‑prolonging agents.
  • Hepatic impairment: adjust dose and monitor liver function.
  • Dependence risk: avoid abrupt discontinuation to prevent withdrawal.
  • Pregnancy and lactation: safety unknown, weigh benefits against risks.
  • Store at ambient temperature: keep in original container, protect from moisture.

Avoid Interactions

Methadone can interact with other medicines, affecting its safety and efficacy.

Major Interactions (Avoid)

  • CNS depressants (e.g., benzodiazepines, alcohol): risk of profound sedation and respiratory depression.
  • QT‑prolonging drugs (e.g., quinidine, sotalol): additive cardiac risk.
  • Strong CYP3A4 inhibitors (e.g., ketoconazole, erythromycin): increase methadone plasma levels.
  • MAO inhibitors: potential for severe serotonin syndrome.

Moderate Interactions (Monitor Closely)

  • CYP3A4 inducers (e.g., rifampin, carbamazepine): may reduce efficacy.
  • Other opioids: may enhance opioid effects.
  • Antidepressants (SSRIs, SNRIs): monitor for serotonin excess.
  • Antihistamines and anticholinergics: may increase anticholinergic burden.

Frequently Asked Questions

Methadone Sugar Free Thornton & Ross is prescribed primarily for the treatment of opioid dependence, helping to reduce withdrawal symptoms and cravings, and for the management of chronic severe pain when other analgesics are insufficient.

Methadone acts as a full agonist at mu‑opioid receptors in the brain and spinal cord, providing analgesia and suppressing opioid withdrawal. It also inhibits the reuptake of serotonin and norepinephrine, which contributes to its stabilising effect on mood during substitution therapy.

The appropriate dose of methadone is individualized and set by the prescribing clinician based on the patient’s condition, prior opioid exposure, and response to therapy. Dosage adjustments are made under medical supervision to ensure safety and effectiveness.

Safety of methadone in pregnancy and lactation is not fully established. Clinicians must weigh the benefits of treating opioid dependence against potential risks to the fetus or infant, and decisions should be made on a case‑by‑case basis.

To place an 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.

Methadone is a long‑acting synthetic opioid that provides stable plasma levels, reducing cravings and withdrawal more consistently than short‑acting opioids. Compared with buprenorphine, methadone has a higher risk of respiratory depression but may be preferred in patients requiring higher analgesic potency.

Methadone Sugar Free Thornton & Ross should be stored at ambient temperature, below 25 °C, in its original packaging to protect it from moisture and light. Keep the container tightly closed and out of reach of children.

Methadone is administered orally, typically as a tablet or liquid formulation, and should be taken exactly as prescribed. The dose may be divided throughout the day for pain management or taken once daily for opioid substitution, depending on the clinical plan.

The most serious risks include respiratory depression, especially when combined with other CNS depressants, and cardiac arrhythmias due to QT interval prolongation. Patients should be monitored closely for signs of overdose, severe hypotension, and rare allergic reactions.

Methadone is contraindicated in individuals with known hypersensitivity to methadone, those with severe respiratory insufficiency, uncontrolled cardiac arrhythmias, or in patients currently taking monoamine oxidase inhibitors. Caution is also advised for patients with significant hepatic impairment.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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