Application-driven Tafenoquine segmentation dissects demand by clinical indication, the primary driver of prescription behaviour and payer reimbursement. Malaria prevention (chemoprophylaxis in travellers and military) accounts for the largest share because it requires repeat weekly dosing, multiplying course volume. Malaria treatment (radical cure of Plasmodium vivax) is growing fastest owing to WHO guidelines now explicitly recommending single-dose Tafenoquine to replace 14-day primaquine; the addressable pool of vivax patients in Brazil, India, and Indonesia underpins forecast upside. Off-label research use (e.g., babesiosis, P. cynomolgi studies) is currently marginal but informs lifecycle extension strategies. Each application's revenue contribution equals diagnosed cases multiplied by compliance-adjusted dosing and net price, explaining why prevention still outweighs treatment despite higher treatment pricing per course.