Malirid Tablet (Primaquine Phosphate) | Used for Malaria Treatment and Relapse Prevention
Malirid Tablet (Primaquine) is an antimalarial medicine used for the radical cure and prevention of relapse of Plasmodium vivax and Plasmodium ovale malaria. It works by targeting and eliminating the dormant liver stages (hypnozoites) of the malaria parasite, preventing future relapses and reducing the risk of transmission to others. IT belongs to the group of "antimalarials" mainly used to treat malaria. The disease is caused by the plasmodium parasite, which is transmitted through the bite of an infected mosquito.
Product Overview
Malirid Tablet is a highly effective antimalarial medication specifically formulated for the radical cure and prevention of malaria relapses. Containing Primaquine Phosphate, it belongs to the 8-aminoquinoline class of drugs. Unlike standard antimalarials that only target parasites in the blood, Malirid is unique in its ability to eliminate dormant liver-stage parasites (hypnozoites). This makes it an indispensable parasite-killing treatment for ensuring the infection does not return weeks or months later.
Product Composition
- Primaquine Phosphate IP/USP: Equivalent to Primaquine 2.5mg, 7.5 mg or 15 mg (Active Ingredient)
- Chemical Class: 8-Aminoquinoline derivative
- Excipients: Lactose, Starch, and Magnesium Stearate
- Coating: Film-coated to mask the bitter taste and ensure stable delivery
Product Specification
| Feature | Details |
| Brand Name | Malirid / Malirid-DS |
| Active Component | Primaquine Phosphate |
| Therapeutic Class | Antiprotozoal / Antimalarial |
| Target Parasites | P. vivax and P. ovale |
| Storage | Store below 30°C in a dry, dark place |
Mechanism of Action
- Acts primarily as a tissue schizonticide, targeting the liver stages of the Plasmodium parasite where other drugs cannot reach.
- Disrupts the parasite's mitochondria and cellular machinery by generating reactive oxygen species (free radicals).
- Increases levels of haeme in the blood, which is highly toxic to the survival of malarial parasites.
- Functions as a gametocytocide, killing the sexual forms of the parasite in the blood, which helps prevent the transmission of malaria back to mosquitoes.
Key Benefits
- Prevents Relapse: The only widely available treatment that provides a radical cure by destroying latent parasites in the liver.
- Comprehensive Eradication: Ensures the complete removal of P. vivax and P. ovale strains from the body.
- Transmission Control: By killing gametocytes, it acts as a public health tool to stop the spread of malaria within communities.
- Synergistic Effect: Works perfectly when used after a course of Chloroquine to provide a total malaria cure.
- Travel Safety: An essential component for individuals traveling to endemic regions to ensure no dormant infection is carried back.
Precautions
| Condition or Situation | Precaution |
|---|---|
| G6PD deficiency | Avoid use due to risk of severe hemolysis |
| Blood disorders | Use only with strict medical supervision |
| Liver disease | Use cautiously as it may affect liver function |
| Kidney disease | Dose adjustment may be required |
| Pregnancy | Not recommended due to risk to fetus |
| Breastfeeding | Avoid unless clearly advised by doctor |
| Alcohol use | Avoid as it may increase side effects and liver stress |
| Severe anemia | Not recommended due to risk of worsening condition |
| Other antimalarials | Use only in combination as prescribed |
| Allergies | Avoid if allergic to Primaquine or similar medicines |
Important Safety Information
- Take Malirid Tablet only under medical supervision
- G6PD testing is required before starting treatment
- Complete full course even if symptoms improve early
- Report symptoms like dark urine, fatigue, or shortness of breath immediately
- Do not self-medicate or change dose without medical advice
- Regular blood monitoring may be required during treatment
Usage
Malirid Tablet is a specialized antimalarial therapy designed to achieve a complete parasite clearance. Because Primaquine Phosphate affects the liver stage of the infection, strict adherence to the prescribed course is vital to prevent the recurrence of symptoms.
Administration Steps
Mealtime Intake: Always take this antimalarial pill with food or a glass of milk to significantly reduce gastrointestinal upset or stomach cramps.
Whole Consumption: Swallow the tablet whole with water; do not crush or break it to ensure the active ingredient is absorbed correctly.
G6PD Screening: It is mandatory to undergo a G6PD deficiency test before starting treatment, as this medication can cause hemolytic anemia in deficient individuals.
Strict Consistency: Complete the full 14-day course even if you feel better after a few days; stopping early allows liver-stage parasites to survive and cause a relapse.
Time Management: Take your dose at the same time every day to maintain a steady level of Primaquine in your bloodstream.
Uses
Radical Cure of Malaria: Specifically used to eliminate the dormant "hypnozoite" stage of Plasmodium vivax and Plasmodium ovale from the liver.
Prevention of Relapse: Ensures that the patient does not suffer from repeated episodes of malarial fever weeks or months after the initial infection.
Blocking Transmission: Kills the sexual forms (gametocytes) of the parasite, preventing the infection from being passed from a human host to a mosquito.
Treatment of P. falciparum: Used as a single-dose adjunct therapy to reduce the spread of drug-resistant malaria strains.
Pneumocystis jirovecii Pneumonia: Utilized as an alternative treatment for this specific type of lung infection in patients with immunodeficiency.
Side Effects
Common Side Effects
- Nausea or stomach discomfort
- Loss of appetite
- Mild abdominal cramps
- Headache or dizziness
- Weakness or fatigue
Less Common Side Effects
- Vomiting or diarrhea
- Mild skin rash or itching
- Temporary darkening of urine
- Mild changes in blood counts
- Metallic taste in mouth
Rare Side Effects
| Rare Side Effect | Description |
|---|---|
| Hemolytic anemia | Breakdown of red blood cells, especially in G6PD deficiency |
| Severe allergic reaction | May include swelling, rash, or breathing difficulty |
| Severe anemia | Significant drop in hemoglobin levels |
| Liver toxicity | May cause jaundice or abnormal liver function |
| Methemoglobinemia | Rare condition affecting oxygen delivery in blood |
Important Safety Information
- G6PD testing is essential before starting treatment
- Stop treatment and seek help if dark urine or severe fatigue occurs
- Regular blood monitoring may be required
- Take medicine exactly as prescribed
- Report any unusual symptoms immediately
FAQs
Q: What is Malirid Tablet used for?
A: Malirid Tablet is used for the radical cure and prevention of relapse of Plasmodium vivax and Plasmodium ovale malaria. It is also used to reduce the transmission of malaria by eliminating the parasite from the body.
Q: How does Malirid Tablet work?
A: Malirid contains Primaquine, which works by targeting and destroying the dormant liver stages (hypnozoites) of the malaria parasite. This prevents the parasite from reactivating and causing relapse of malaria infection.
Q: How should I take Malirid Tablet?
A: Take Malirid Tablet exactly as prescribed by your doctor, usually once daily with food to reduce the risk of stomach upset. Complete the full course of treatment even if you feel better.
Q: How long is the course of treatment with Malirid Tablet?
A: The usual course of treatment is 14 days, though the duration may vary depending on the type and severity of malaria infection. Always follow your doctor's prescribed treatment plan.
Q: What are the common side effects of Malirid Tablet?
A: Common side effects include nausea, vomiting, stomach cramps, and loss of appetite. Taking the tablet with food can help reduce stomach-related side effects. Consult your doctor if side effects persist or worsen.
Q: Can Malirid Tablet cause serious side effects?
A: In patients with G6PD (Glucose-6-Phosphate Dehydrogenase) deficiency, Primaquine can cause haemolytic anaemia, a serious condition where red blood cells are destroyed faster than they are produced. Seek immediate medical attention if you notice dark urine, pale skin, or extreme fatigue.
Q: Who should not take Malirid Tablet?
A: Malirid Tablet should not be taken by patients with G6PD deficiency, lupus, rheumatoid arthritis, or those taking medicines that can cause haemolytic anaemia. Always inform your doctor of your full medical history before starting treatment.
Q: Is a G6PD test required before taking Malirid Tablet?
A: Yes. A G6PD test is strongly recommended before starting Primaquine treatment to identify patients at risk of haemolytic anaemia. Your doctor will advise you accordingly.
Q: Can pregnant or breastfeeding women take Malirid Tablet?
A: No. Malirid Tablet is not recommended during pregnancy as it may harm the unborn baby. It is also not advised during breastfeeding unless the infant has been tested for G6PD deficiency. Consult your doctor for safe alternatives.
Q: What should I do if I miss a dose of Malirid Tablet?
A: If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one.
Interactions
| Interacting medicine or condition | Possible interaction effect |
|---|---|
| Other antimalarial drugs | May increase side effects or require dose adjustment |
| Blood affecting medicines | May increase risk of anemia or hemolysis |
| Sulfa drugs | May increase risk of blood-related adverse effects |
| Antibiotics (e.g., quinolones) | May increase risk of side effects |
| Liver affecting medicines | May increase risk of liver toxicity |
| Alcohol | May increase risk of liver damage and side effects |
| Bone marrow suppressing drugs | May increase risk of low blood counts |
| G6PD deficiency conditions | High risk of severe hemolytic reaction |
| Herbal supplements | May interfere with treatment effectiveness |
Important Interaction Advice
- Inform your doctor about all medicines and supplements you use
- Avoid alcohol during treatment
- Do not combine with other antimalarial drugs without supervision
- Regular blood tests may be required during therapy
- Report symptoms like dark urine, fatigue, or unusual weakness immediately
- Follow malaria treatment plan strictly as prescribed
| Manufacturer | : | Ipca Laboratories Ltd |
| Trade Name | : | Primaquine |
| Generic Search | : | Primaquine Phosphate |
| Strength | : | 2.5mg, 7.5mg, 15mg, 45mg |
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