Used for centuries to fight intestinal parasites, ease digestion, reduce fever, and to lessen ones taste for alcohol.Quassia (bitter wood, bitter ash) contains anti-malarial phytochemicals and is helpful in treating digestive problems, malaria, fevers and dysentery. It is also used as an insecticide and tonic. It has anti-parasitic, anti-inflammatory, anti-leukemic, anti-tumour, anti-viral, astringent, laxative, sedative, blood cleansing, insecticidal, anti-ulcer and digestive and bile stimulant properties. It can stimulate the appetite and help reduce the symptoms of alcohol withdrawal. It is of use to help treat fevers, parasites, dysentery, dyspepsia, intestinal gas, stomachache, anaemia and liver and gastrointestinal disorders. Also, it kills lice, fleas, scabies and other skin parasites.