Quassia is used for treating an eating disorder called anorexia, indigestion, constipation, and fever. It is also used to rid the intestines of various kinds of worms; as a tonic or purgative; and as a mouthwash.
Great for low iron levels, sickle cell, cancer, lupus and candida

Some people apply quassia directly to the scalp for lice.

Rectally, quassia is used for treating worm infestations.

In manufacturing, quassia is used to flavor foods, beverages, lozenges, and laxatives. The bark and wood have been used as an insecticide.

quassia for stomach and intestinal problems, diabetes, lice, skin conditions, and many other conditions, but there is no good scientific evidence to support most uses.
Quassia contains chemicals that kills  parasite and malaria  malaria.  These chemicals might also increase stomach acid and bile secretions, perhaps accounting for appetite stimulant and digestive effects.

• Indigestion.
• Constipation.
• Fever.
• Intestinal worms.
• Other conditions.
• boil the bark and make tea
• Pregnancy and breast-feeding: Quassia is LIKELY UNSAFE when taken by mouth during pregnancy or breast-feeding