“Although the parasites were highly resistant against 4-aminoquinolines, significant synergism was observed between chloroquine and retinol as well as amodiaquine and retinol , the latter at physiological concentrations.”
“Synergism between amodiaquine and retinol was greater, with strong and highly significant reductions of the GMCOC, from 2520 nM for amodiaquine to 1092 nM for AMO-RET low, 800 nM for AMO-RET medium, and 745 nM for AMO-RET high.”