“In vitro, gossypol inhibited aminopyrine N-demethylase activity, the concentration causing 50% inhibition being approximately 0.03 mM; the inhibition was non-competitive.”
“In vivo, gossypol , after 4 weeks of daily administration (30 mg/kg/day) caused a significant reduction in microsomal protein, cytochrome P450 and aminopyrine N-demethylase activity.”