Product image of Levodopa/Carbidopa/Entacapone Orion (Carbidopa, Entacapone, Levodopa) supplied by GNH India

Levodopa/Carbidopa/Entacapone Orion

Active Ingredient:
Carbidopa, Entacapone, Levodopa
Origin:
EU

Levodopa/Carbidopa/Entacapone Orion (Carbidopa, Entacapone, Levodopa)

Levodopa/Carbidopa/Entacapone, the active ingredient in Levodopa/Carbidopa/Entacapone Orion, is a dopamine precursor / COMT inhibitor combination presented as an oral tablet for oral use. It is indicated for the treatment of Parkinson's disease and for patients who experience motor fluctuations while on levodopa therapy.

GNH India supplies Levodopa/Carbidopa/Entacapone Orion as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Orion Corporation

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Indications & Clinical Uses

Levodopa/Carbidopa/Entacapone is used in the management of Parkinson's disease and related motor fluctuations.

  • Parkinson's disease: improves overall motor function and reduces bradykinesia.
  • Parkinson's disease with motor fluctuations: decreases OFF periods and prolongs ON time.
  • Early-stage Parkinson's disease: provides symptomatic relief as part of combination therapy.

How It Works

  • Levodopa is absorbed and crosses the blood‑brain barrier where it is decarboxylated to dopamine, restoring deficient central dopamine. Carbidopa inhibits peripheral aromatic L‑amino acid decarboxylase, preventing premature conversion of levodopa and increasing its cerebral availability. Entacapone blocks catechol‑O‑methyltransferase (COMT), reducing peripheral levodopa metabolism and extending its therapeutic plasma half‑life.

Side Effects

Levodopa/Carbidopa/Entacapone may cause a range of adverse reactions. Patients should be monitored for both frequent and serious events.

Common Side Effects

  • Nausea
  • Vomiting
  • Dizziness or light‑headedness
  • Orthostatic hypotension
  • Headache
  • Insomnia

Serious or Rare Side Effects

  • Dyskinesia (involuntary movements)
  • Hallucinations or psychosis
  • Severe hypotension or syncope
  • Neuroleptic malignant syndrome
  • Severe allergic reactions (rash, angioedema)
  • Hyperpyrexia or fever of unknown origin

Precautions & Warnings

When prescribing Levodopa/Carbidopa/Entacapone, clinicians should consider several safety measures.

  • Blood pressure monitoring: watch for orthostatic drops, especially after dose initiation.
  • Renal or hepatic impairment: dose may need adjustment; assess organ function regularly.
  • Psychiatric assessment: monitor for hallucinations, confusion, or mood changes.
  • Concomitant dopamine antagonists: avoid abrupt discontinuation to prevent severe withdrawal.
  • Elderly patients: start at low dose and titrate slowly due to increased sensitivity.
  • Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Levodopa/Carbidopa/Entacapone interacts with several drug classes; some require avoidance while others need close monitoring.

Major Interactions (Avoid)

  • Non‑selective MAO inhibitors (e.g., phenelzine): risk of hypertensive crisis.
  • Antipsychotics that block dopamine receptors (e.g., haloperidol): may reduce therapeutic effect.
  • High‑dose alpha‑adrenergic blockers: can cause severe hypotension.

Moderate Interactions (Monitor Closely)

  • SSRIs or SNRIs: may increase risk of serotonin syndrome.
  • Iron or vitamin B6 supplements: can reduce levodopa absorption; separate dosing by at least 2 hours.
  • High‑protein meals: may compete with levodopa transport, diminishing efficacy.

Frequently Asked Questions

Levodopa/Carbidopa/Entacapone Orion is prescribed to manage the motor symptoms of Parkinson's disease and to reduce motor fluctuations, such as OFF periods, in patients already receiving levodopa therapy. It helps improve movement control and overall daily functioning.

The combination works on three levels: levodopa is converted to dopamine in the brain, carbidopa blocks peripheral conversion of levodopa to increase its availability to the central nervous system, and entacapone inhibits the COMT enzyme, slowing levodopa breakdown and extending its effect.

Dosing is individualized and must be determined by a qualified prescriber based on the patient’s clinical condition, response, and tolerability. The healthcare professional will adjust the dose to achieve optimal symptom control while minimizing side effects.

Safety data are limited. The medication should only be used during pregnancy or lactation if the potential benefits outweigh the risks, and this decision must be made by the prescribing physician in consultation with the patient.

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 necessary import documentation.

Standard levodopa alone is rapidly metabolized, leading to fluctuating plasma levels. Adding carbidopa and entacapone reduces peripheral breakdown, providing more stable dopamine concentrations, fewer OFF periods, and often a lower total levodopa dose compared with levodopa monotherapy.

Levodopa/Carbidopa/Entacapone Orion tablets should be stored at room temperature, below 25 °C, in the original packaging to protect from moisture and light. Keep the container tightly closed and out of reach of children.

The medication is taken orally, usually with food or a light snack to reduce gastrointestinal irritation. Tablets should be swallowed whole with a full glass of water and not crushed or chewed unless specifically instructed by a healthcare professional.

Serious risks include dyskinesia (involuntary movements), hallucinations or psychosis, severe hypotension leading to fainting, and rare but life‑threatening conditions such as neuroleptic malignant syndrome or severe allergic reactions. Prompt medical attention is required if any of these occur.

Patients with known hypersensitivity to levodopa, carbidopa, entacapone, or any excipients should avoid this medication. It is also contraindicated in individuals taking non‑selective MAO inhibitors. Physicians should evaluate each patient’s medical history before prescribing.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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