Antimalarial Drugs ✓ Passing Score: 50% 📝 Questions: 20 🎓 Practice Quiz Welcome! This is a practice quiz to test your knowledge. Please enter your details below to participate. Your results will be emailed to you upon completion. Your Information Name * Email * Start Quiz → Question 1 of 20 1 Which antimalarial drug is contraindicated in pregnancy due to teratogenic risk? * Mefloquine Artemisinin derivatives Chloroquine Primaquine Atovaquone/proguanil 2 Which drug is commonly used as a second‑line treatment for chloroquine‑resistant P. falciparum malaria? * Quinine Doxycycline Mefloquine Sulfadoxine/pyrimethamine Atovaquone/proguanil 3 What is the primary adverse effect of quinine when used for malaria treatment? * Acute kidney injury Cardiac arrhythmias (QT prolongation) Ototoxicity Hemolytic anemia Severe neuropsychiatric syndrome 4 Which antimalarial drug should be avoided in patients with a history of QT prolongation? * Chloroquine Atovaquone/proguanil Artemisinin derivatives Quinine Primaquine 5 In the treatment of uncomplicated P. falciparum malaria, the WHO recommends a 3‑day regimen of which drug combination? * Atovaquone/proguanil + doxycycline Chloroquine + sulfadoxine/pyrimethamine Mefloquine + primaquine Quinine + doxycycline Artemether/lumefantrine (AL) 6 What is the principal reason for using combination therapies (e.g., ACTs) in malaria treatment? * To shorten treatment duration To reduce cost To prevent drug resistance To improve taste To increase side‑effect profile 7 Which antimalarial drug is a prodrug that requires hepatic activation to produce its active metabolite? * Artemisinin derivatives Chloroquine Mefloquine Atovaquone Primaquine 8 Which drug class is NOT typically used in antimalarial therapy? * Artemisinin derivatives 4-aminoquinolines Quinolones Benzimidazoles Antifolates 9 For prophylaxis against malaria in travelers to endemic areas, which drug regimen is recommended for short‑term exposure (≤4 weeks)? * Mefloquine weekly Artemether/lumefantrine daily Quinine daily Chloroquine daily Atovaquone/proguanil daily 10 Which of the following antimalarial agents has the longest half‑life and is therefore used for post‑treatment prophylaxis? * Primaquine Artemisinin derivatives Chloroquine Mefloquine Atovaquone 11 In a patient with G6PD deficiency, which antimalarial drug should be avoided due to risk of hemolysis? * Primaquine Quinine Artemisinin derivatives Chloroquine Atovaquone/proguanil 12 Which antimalarial drug is known to cause a purpuric rash in a subset of patients due to its effect on platelet function? * Mefloquine Atovaquone/proguanil Artemisinin derivatives Primaquine Chloroquine 13 What is the main reason for the emergence of artemisinin resistance in Southeast Asia? * Reduced bioavailability of atovaquone Overuse of quinine Genetic mutations in the K13 propeller domain Lack of adherence to chloroquine Cross‑resistance to doxycycline 14 What is the recommended dose of artemisinin‑based combination therapy for a 70‑kg adult with uncomplicated falciparum malaria? * 20 mg/kg once daily 5 mg/kg twice daily 30 mg/kg once daily 10 mg/kg twice daily 15 mg/kg once daily 15 Which antimalarial combination is most effective for severe malaria requiring intravenous therapy? * Quinine + doxycycline Mefloquine + primaquine Chloroquine + sulfadoxine/pyrimethamine Atovaquone/proguanil + doxycycline Artemisinin + doxycycline 16 In a patient with severe malaria who cannot tolerate oral medications, which antimalarial drug can be administered intravenously? * Artemether Chloroquine Primaquine Mefloquine Atovaquone 17 Which antimalarial agent can be used to treat both uncomplicated malaria and provide prophylaxis for travelers? * Chloroquine Quinine Mefloquine Artemisinin derivatives Atovaquone/proguanil 18 Which antimalarial drug is specifically used for radical cure of P. vivax and P. ovale infections by targeting hypnozoites? * Artemisinin derivatives Primaquine Atovaquone/proguanil Chloroquine Mefloquine 19 Which antimalarial drug is most commonly used as a first‑line treatment for uncomplicated Plasmodium falciparum malaria in most endemic regions? * Quinidine Atovaquone/proguanil Artemisinin‑based combination therapy (ACT) Chloroquine Mefloquine 20 What is the primary mechanism of action of chloroquine against malaria parasites? * Inhibition of heme polymerase in the food vacuole Inhibition of dihydrofolate reductase Inhibition of protein synthesis at the ribosome Disruption of mitochondrial electron transport Interference with parasite microtubule formation ← Previous Next → Submit Quiz ✓