📌 Introduction
Antimalarial drugs are used to treat and prevent malaria, a serious parasitic disease caused by Plasmodium species. Malaria is transmitted through the bite of infected female Anopheles mosquitoes.
This topic is highly important for GPAT, DSSSB, and other pharmacy exams.
🔍 What is Malaria?
Malaria is caused by parasites such as:
• Plasmodium falciparum
• Plasmodium vivax
• Plasmodium malariae
• Plasmodium ovale
It affects red blood cells and can cause fever, chills, and severe complications.
📝 Classification of Antimalarial Drugs
Antimalarial drugs are classified based on their action:
• Blood schizonticides
Examples: Chloroquine, Quinine
• Tissue schizonticides
Examples: Primaquine
• Gametocides
Examples: Primaquine
• Artemisinin derivatives
Examples: Artemether, Artesunate
🧬 Mechanism of Action
• Chloroquine → inhibits heme polymerization
• Quinine → interferes with parasite metabolism
• Primaquine → destroys liver stages
• Artemisinin → produces free radicals → kills parasite
🩺 Pharmacological Effects
• Kill Plasmodium parasites
• Reduce parasitic load
• Prevent relapse
💊 Therapeutic Uses
Used in:
• Treatment of malaria
• Prevention (prophylaxis)
• Severe malaria cases
🚨 Side Effects
• Nausea, vomiting
• Headache
• Hemolysis (Primaquine in G6PD deficiency)
• Visual disturbances (Chloroquine)
📑 Important Exam Points
• Chloroquine → most common drug
• Primaquine → prevents relapse
• Artemisinin → most effective in resistant malaria
• Malaria treatment depends on species
🛑 Precautions
• Check G6PD before Primaquine
• Avoid overdose
• Use combination therapy in resistant cases
🎯 Conclusion
Antimalarial drugs are essential in the control and treatment of malaria. Understanding their classification, mechanism, and uses is crucial for exams and clinical knowledge.
👉 Practice MCQs in evening post
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