A Patient Is Preparing to Travel to a Country with Prevalent

A patient is preparing to travel to a country with prevalent malaria. To prevent contracting the disease, the provider has ordered chloroquine HCl (Aralen) . The nurse will instruct the patient to take this drug according to which schedule?

A) 500 mg weekly beginning 2 weeks prior to travel and continuing for 8 weeks after travel
B) 1000 mg weekly beginning 2 weeks prior to travel and continuing for 8 weeks after travel
C) 500 mg once followed by 500 mg per dose in 6 hours, 24 hours, and 48 hours
D) 1000 mg once daily for 2 days followed by 500 mg daily for 2 to 3 weeks