
Picrasma excelsa
Also known as Jamaican Quassia, Quassia excelsa Sw, Surinam Quassia, Quassia, Bitter-wood, Bitter-ash.
The wood and bark are both medicinal, though the former is most used. It is an intense bitter, less relaxing than stimulating, expending its influence mainly upon the digestive organs, but scarcely affecting the circulation.

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| Preparation | As written | Metric |
|---|---|---|
| Q 491 Dried wood 0.3-0.6 g by cold infusion three times daily | 300-600 mg | |
| (G6, G7) Concentrated Quassia Infusion (BPC 1959) 2 -4 mL | 2-4 mL | |
| Tincture of Quassia (BP 1948) 2 -4 mL | 2-4 mL | |
| Dose, one to two fluid drachms | 3.7-7.39 mL |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Properties and Uses. The wood and bark are both medicinal, though the former is most used. It is an intense bitter, less relaxing than stimulating, expending its influence mainly upon the digestive organs, but scarcely affecting the circulation.
Description. Natural Order, Simarubaceae. This is the Quassia excelsa of Linnaeus, though the genuine plant is the Quassia amara. The species amara is a large shrub, or low tree, inhabiting Surinam; while the excelsa is a lofty tree with a very large trunk, and is found in Jamaica and other portions of the West Indies.
Drawn from Cook's Physio-Medical Dispensatory, and the Bountiful Herbs editorial.

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