Product image of Malastad (Proguanil Hydrochloride, Atovaquone) supplied by GNH India

Malastad

Active Ingredient:
Proguanil Hydrochloride, Atovaquone
Origin:
EU

Malastad (Proguanil Hydrochloride, Atovaquone)

Proguanil Hydrochloride and Atovaquone, the active ingredient in Malastad, is an antimalarial combination presented as an oral dosage form for oral use. It is used for prevention of malaria infection and treatment of acute uncomplicated malaria in adults and children as prescribed.

GNH India supplies Malastad as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Stada Arzneimittel Ag

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Indications & Clinical Uses

Malastad, an antimalarial combination, is used in the prevention and treatment of malaria.

  • Prevention of malaria infection: provides prophylactic protection for travelers and residents in endemic areas.
  • Treatment of acute uncomplicated malaria: clears Plasmodium parasites in patients with confirmed infection.
  • Chemoprophylaxis in high‑risk groups: reduces risk of malaria in individuals with increased exposure, such as military personnel.

How It Works

  • Atovaquone blocks mitochondrial electron transport in Plasmodium parasites, disrupting energy production, while proguanil is converted to cycloguanil, which inhibits the parasite's dihydrofolate reductase enzyme. The dual action produces synergistic antimalarial activity, preventing parasite replication and facilitating clearance of infection.

Side Effects

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

Common Side Effects

  • Nausea: mild gastrointestinal upset.
  • Headache: transient headache.
  • Abdominal pain: discomfort in the stomach area.
  • Vomiting: occasional emesis.

Serious or Rare Side Effects

  • Severe hypersensitivity reactions: including rash, pruritus, or anaphylaxis.
  • Hepatotoxicity: elevated liver enzymes or jaundice.
  • Blood dyscrasias: rare cases of neutropenia or agranulocytosis.

Precautions & Warnings

When prescribing Malastad, consider the following precautions to ensure safe use.

  • Renal impairment: adjust use in patients with severe kidney dysfunction.
  • Hepatic disease: use with caution in liver impairment.
  • Pregnancy and lactation: safety not established; evaluate risk vs benefit.
  • Drug resistance: avoid monotherapy and ensure adherence to regimen.
  • Concomitant medications: review for potential interactions, especially with CYP450 substrates.
  • Store at ambient temperature: keep below 25°C, retain original packaging, protect from moisture.

Avoid Interactions

Malastad can interact with other medicines; awareness of major and moderate interactions helps prevent adverse outcomes.

Major Interactions (Avoid)

  • Strong CYP2C8 inhibitors (e.g., gemfibrozil): may increase atovaquone levels, risk of toxicity.
  • Antacids containing aluminum or magnesium: reduce atovaquone absorption, compromising efficacy.

Moderate Interactions (Monitor Closely)

  • Rifampin: induces metabolism, lowering atovaquone concentrations.
  • Warfarin: proguanil may enhance anticoagulant effect, monitor INR.
  • Sulfonamides: additive risk of hypersensitivity reactions.

Frequently Asked Questions

Malastad is an antimalarial medication indicated for the prevention of malaria infection in travelers and residents of endemic areas, and for the treatment of acute uncomplicated malaria caused by Plasmodium species.

Atovaquone interferes with the parasite's mitochondrial electron transport chain, halting energy production, while proguanil is metabolised to cycloguanil, which blocks the parasite's dihydrofolate reductase enzyme. Together they provide a synergistic effect that stops parasite replication.

The dosage of Malastad is determined by the prescribing clinician based on the patient’s age, weight, indication (prophylaxis or treatment), and local resistance patterns. Patients should follow the prescriber’s instructions exactly.

Safety of Malastad in pregnancy and lactation has not been established. Healthcare providers must weigh the potential benefits against possible risks and consider alternative therapies when appropriate.

To order Malastad, 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.

Malastad combines two agents with complementary mechanisms, offering broader activity and reduced resistance risk compared with single‑component drugs such as chloroquine or mefloquine. Its efficacy is comparable to other combination therapies like artemisinin‑based regimens, but choice depends on regional resistance patterns and patient factors.

Malastad should be stored at ambient temperature, preferably below 25 °C, in its original packaging to protect it from moisture and light. Keep the product out of reach of children and do not use if the packaging is damaged.

Malastad is taken orally, usually with food or a milky drink to enhance absorption of atovaquone. The exact timing and frequency are prescribed by the healthcare professional and should be adhered to for optimal effectiveness.

Serious risks include severe hypersensitivity reactions such as rash, itching, or anaphylaxis, hepatotoxicity manifested by elevated liver enzymes or jaundice, and rare blood disorders like neutropenia. Patients should seek immediate medical attention if these symptoms occur.

Malastad is contraindicated in individuals with known hypersensitivity to proguanil, atovaquone, or any component of the formulation. It should also be avoided in patients with severe renal or hepatic impairment unless specifically advised by a physician.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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