Pharmacology Primaquine acts on which stage of life cycle of all human malarial parasites for causal prophylaxis? A Pre erythrocyte B Erythrocyte C Exo erythrocyte D Hyponozoite 💡 Explanation Primaquine acts on which stage of life cycle of all human malarial parasites for causal prophylaxis? ✓ Correct Answer: A. Pre erythrocyte