Pharmacology If a drug is active against the pre-erythrocytic stage of the malarial parasite it will be useful as a: A Suppressive prophylactic B Causal prophylactic C Clinical curative D Radical curative 💡 Explanation If a drug is active against the pre-erythrocytic stage of the malarial parasite it will be useful as a: ✓ Correct Answer: B. Causal prophylactic