Product image of Mecastrin (Melatonin) supplied by GNH India

Mecastrin

Active Ingredient:
Melatonin
Origin:
EU

Mecastrin (Melatonin)

Melatonin, the active ingredient in Mecastrin, is a melatonin receptor agonist presented as an oral formulation for oral use. It is used to help regulate sleep onset and adjust circadian rhythm disturbances in adults.
GNH India supplies Mecastrin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Orifarm Generics A/S

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Indications & Clinical Uses

Mecastrin acts on melatonin receptors to address disorders of sleep regulation.

  • Insomnia: helps initiate and maintain sleep in individuals with difficulty falling asleep.
  • Jet lag: reduces the time needed to adjust to new time zones after long‑distance travel.
  • Circadian rhythm sleep disorders: supports alignment of the internal clock with the desired sleep‑wake schedule.

How It Works

  • Melatonin in Mecastrin binds to MT1 and MT2 receptors in the suprachiasmatic nucleus, mimicking endogenous melatonin. This agonist activity modulates the circadian signaling pathway, decreasing neuronal firing that promotes wakefulness and facilitating the physiological processes that initiate sleep.

Side Effects

Mecastrin may cause a range of adverse reactions, most of which are mild and transient.

Common Side Effects

  • Drowsiness during daytime
  • Headache
  • Dizziness
  • Nausea
  • Vivid dreams
  • Mild gastrointestinal discomfort

Serious or Rare Side Effects

  • Allergic reaction (rash, itching, swelling)
  • Mood changes (depression, irritability)
  • Hormonal effects (altered menstrual cycles)
  • Severe dizziness or fainting
  • Persistent abdominal pain

Precautions & Warnings

Before using Mecastrin, consider the following safety measures.

  • Contraindications: Do not use if you have known hypersensitivity to melatonin.
  • Pregnancy: Consult a healthcare professional before use during pregnancy.
  • Breastfeeding: Discuss potential risks with a physician before taking while nursing.
  • Driving: Avoid operating heavy machinery if you experience drowsiness.
  • Interactions: Review all concurrent medications with a clinician.
  • Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Mecastrin can interact with several drug classes, requiring attention to dosage and timing.

Major Interactions (Avoid)

  • Anticoagulants (e.g., warfarin): increased bleeding risk.
  • Immunosuppressants (e.g., cyclosporine): reduced efficacy.
  • Central nervous system depressants (e.g., benzodiazepines): excessive sedation.

Moderate Interactions (Monitor Closely)

  • Oral contraceptives: possible reduction in hormonal effectiveness.
  • Antidiabetic agents: potential alteration of blood glucose control.
  • Antihypertensives: may enhance blood pressure‑lowering effect.

Frequently Asked Questions

Mecastrin contains melatonin and is used to manage sleep‑related conditions such as insomnia, jet lag, and circadian rhythm sleep disorders by helping to regulate the body’s internal clock.

Melatonin in Mecastrin binds to MT1 and MT2 receptors in the brain’s suprachiasmatic nucleus, signaling that it is night time. This interaction reduces neuronal activity that promotes wakefulness, facilitating the onset of sleep and helping to synchronize circadian rhythms.

The appropriate dose of Mecastrin is determined by the prescribing healthcare professional based on the individual’s condition, age, and response. Patients should follow the prescriber’s instructions and not adjust the dose on their own.

Safety data for melatonin use in pregnancy and lactation are limited. Women who are pregnant, planning to become pregnant, or breastfeeding should discuss potential risks and benefits with their healthcare provider before using Mecastrin.

To order Mecastrin, 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.

Unlike many prescription hypnotics, Mecastrin’s melatonin acts as a physiological hormone that aligns the body’s sleep‑wake cycle rather than directly depressing the central nervous system. This generally results in fewer next‑day sedation effects, but efficacy may vary depending on the specific sleep disorder.

Mecastrin 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.

Mecastrin is taken orally, usually with a glass of water. It is commonly recommended to take the product 30‑60 minutes before the desired bedtime, but patients should follow the timing advised by their prescriber.

Serious risks, though rare, include severe allergic reactions such as rash, swelling, or difficulty breathing, and significant hormonal effects that may alter menstrual cycles or mood. Any unexpected or severe symptoms should prompt immediate medical attention.

Individuals with known hypersensitivity to melatonin, those taking certain anticoagulants, immunosuppressants, or CNS depressants without medical supervision, and patients with uncontrolled endocrine disorders should avoid Mecastrin unless directed otherwise by a qualified healthcare professional.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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