90:4.8
Fasting, dieting, and counterirritants were often used as remedial measures. Human secretions, being definitely magical, were highly regarded; blood and urine were thus among the earliest medicines and were soon augmented by roots and various salts. The shamans believed that disease spirits could be driven out of the body by foul-smelling and bad-tasting medicines. Purging very early became a routine treatment, and the values of raw cocoa and quinine were among the earliest pharmaceutical discoveries.