Pharmacistfag here.

Though I've never dispensed HCQ for malaria prophylaxis, (typically use Malarone/Atovaquone) for interested anons, the dose would be 400mg (2x200mg tabs) once a week starting 2 weeks before travel to endemic zone then continue until 8 weeks AFTER leaving endemic zone.

DOSE WEEKLY

Easy.

Cheap.

Plentiful.

DS Hates POTUS for exposing this.

https://www.drugs.com/dosage/hydroxychloroquine.html