Capsaicin (8-methyl-n-vanillyl-6-nonenamide) caused a dose related (1-
100 nM) haemolysis of human red blood cells. This haemolysis was assoc
iated with significant changes in erythrocyte membrane lipid component
s and acetylcholinesterase (AChE) activity. Ruthenium red blocks this
capsaicin-induced haemolysis and membrane AChE activity changes.