CS and malaria: These interactions were further demonstrated by isobologram analysis at variable potency ratios, wherein MiB/Pg-(Aq) exhibited outright synergistic interaction at all experimental concentrations, while Cp/Og-(EtOH), MiB/Cs-(Aq), and Cp/Cs-(Aq) exhibited antagonistic and synergistic interactions as their concentrations were inversely varied, respectively. In vitro sensitivity assessment of drug combinations for malaria is used to help predict clinically useful combinations.