Alstonia scholaris, Dita Bark.

Malarial diseases, with diarrhoea, dysentery, anaemia, feeble digestion, are the general conditions suggesting this remedy. Characteristics are the gone sensation in stomach and sinking in abdomen, with debility. A tonic after exhausting fevers.
Abdomen.--Violent purging and cramp in bowels. Heat and irritation in lower bowels. Camp diarrhoea, bloody stool, dysentery; diarrhoea from bad water and malaria. Painless watery stools (Phosph ac). Diarrhoea immediately after eating.
Relationship.--Compare: Similar in action to Alstonia constricta, the bitter bark or native quinine of Australia.
Ditain (active principle, is anti-periodic, like quinine, but without unpleasant effects).
Cinchona (similar in diarrhoea, chronic dyspepsia and debility).
Hydrastis; Fer cit et chin.
Dose.--Tincture to third potency. Locally, for ulcers and rheumatic pains.

Boericke's Materia Medica, 1901, was written by William Boericke. Excerpt: The Tinctures.