Mala-N is a….
**Core Concept**
Mala-N is a type of antimalarial medication, specifically a derivative of primaquine. It is used in the treatment of Plasmodium falciparum malaria, particularly in areas where resistance to other antimalarial drugs is prevalent.
**Why the Correct Answer is Right**
Mala-N works by targeting the hypnozoite stage of Plasmodium vivax and Plasmodium ovale, preventing relapse of the disease. It is a prodrug that is metabolized to primaquine, which then inhibits the enzyme dihydrofolate reductase (DHFR), thereby disrupting the parasite's ability to synthesize tetrahydrofolate. This ultimately leads to the death of the parasite.
**Why Each Wrong Option is Incorrect**
**Option A:** This is not correct because Mala-N is not a derivative of chloroquine, which is a different class of antimalarial medication.
**Option B:** This is not correct because Mala-N is not a derivative of atovaquone, which is another type of antimalarial medication used in combination with proguanil.
**Clinical Pearl / High-Yield Fact**
Mala-N should be used with caution in patients with glucose-6-phosphate dehydrogenase (G6PD) deficiency, as it can cause hemolysis in these individuals.
**Correct Answer: B. Mefloquine is the commonly used alternative for Mala-N and is an antimalarial drug.