NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the NAPLEX exam with a comprehensive quiz featuring multiple-choice questions and in-depth explanations. Build your pharmacological knowledge and increase your chances of passing the pharmacist licensure examination!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which malaria prophylaxis is most effective against P. vivax?

Doxycycline (Doryx, vibramycin)
Atovaquone/proguanil (malarone)
Primaquine
Chloroquine

The correct answer is: Primaquine

Primaquine is the most effective prophylaxis against P. vivax, as it specifically targets the dormant liver forms of the parasite, which are responsible for relapses. Doxycycline is a good option for prophylaxis against P. falciparum, but is not as effective against P. vivax. Atovaquone/proguanil is also effective against P. falciparum, but not as effective against P. vivax. Chloroquine is not recommended for prophylaxis against any type of malaria anymore due to widespread resistance.