Rhamnus frangula (L)
Description: This erect shrub which grows up to 6m tall, has long upright branches with shiny brown bark and pronounced light lenticels. There are no thorns. The dark green, entirely smooth leaves turn yellow or red in autumn.. The small, greenish-white flowers arise from leaf axils in the upper branches and give way to globular berries, green turning to red and finally glossy black. Rhamnus forms dense undergrowth along with alder, spindle tree and guelder rose in damp woodland, hedgerows, marshes and swamps in England, Wales, Europe and the US preferring acid and light sand or peaty soils.
Parts used: Bark
Collection: The bark is gathered in spring and should be stored for at least a year before use, thereby allowing the anthrones to oxidise to anthraquinones. A fermentation process occurs on storage that destroys the emetic fragularoside.
Constituents: Up to 8% anthraquinones (glucofrangulin A, glucofrangulin B) derived from the aglycone frangula-emodin; glycosides, peptide alkaloids (frangulanin, franganin), tannins
Actions: Tonic, stimulating mild to medium laxative, gentle purgative, cholagogue, antiparasitic, local antiseptic
Therapeutics and Pharmacology: Rhamnus frangula is used to treat occasional constipation and conditions in which softer faeces are desirable, such as haemorrhoids. It may be given in cases of spastic constipation, it's colic-inducing effect being minimal. It may be used in obstructive conditions of the biliary tract and as a general blood cleanser for chronic toxic conditions associated with bowel or digestive disorders and it can aid regulation of disturbed bowel flora. The decoction may be used as an antiseptic mouthwash for gum disease and mouth infections, or as a rinse for infestations of the scalp.
Hydroxyanthracene glycosides are poorly absorbed from the small intestine but are hydrolysed by bacteria to the active aglycones, which are then partly absorbed in the colon. They are predominantly excreted in the faeces but also in urine, where they produce an orange colour. Anthrones and anthranols will also pass into breast milk. The hydroxyanthracene aglycones inhibit water and electrolyte absorption from the colon and induce active secretion of water and electrolytes into the intestinal lumen. Due to the increased volume of contents, intestinal pressure is increased stimulating peristalsis. The anthrones, anthranols and their glycosides are considered to be the emetic principles.
Caution: The fresh bark causes violent griping pains, emesis and nausea. This herb should be avoided during pregnancy and lactation and if intestinal obstruction is suspected. It should be taken for short periods only (10 days) to avoid dependence.
Preparation and Dosage:
Regulatory Status: GSL
One dose or two half-doses daily, preferably at bedtime (half dose morning and night)
Dried bark: 0.5-2.5g or by decoction
Liquid Extract: 1:1 in 25% alcohol, 0.5-2.5ml
Additional Comments: The name Rhamnus is derived from the Greek rhamnos, meaning a branch. The bark and leaves of Alder Buckthorn yield a yellow dye which turns black when mixed with iron salts.
Bradley, P.R. (ed.) 1992 British Herbal Compendium, Volume 1, BHMA, Bournemouth.
BHMA 1983 British Herbal Pharmacopoeia, BHMA, Bournemouth.
Grieve, M. 1931 A Modern Herbal, (ed. C.F. Leyel 1985), London.
Lust, J. 1990 The Herb Book, Bantam, London.
Mills, S.Y. 1993 The Essential Book of Herbal Medicine, Penguin, London (First published in 1991 as Out of the Earth, Arkana)
Mills, S.Y. 1993 The A-Z of Modern Herbalism, Diamond Books, London.
Weiss, R.F. 1991 Herbal Medicine, Beaconsfield Arcanum, Beaconsfield.
Wren, R.C. 1988 Potter's New Cyclopaedia of Botanical Drugs and Preparations, C.W.Daniel, Saffron Walden.
Contact: email@example.com Please complete the 'Subject' heading or your email will be assumed to be spam and automatically deleted. Before you contact me, I'd be grateful if you would please check to see if this website has the answer to your question (search box at the top of the homepage) - I have time to answer only a few of the many emails that arrive in my inbox every day. See also the statement below:
For your safety I am prohibited from giving specific medical advice to individuals over the internet or telephone so please do not waste your time or mine by emailing or calling me with detailed information about your health problems - I can only undertake face-to-face consultations for what should be obvious reasons. Diagnoses cannot be made remotely, and I am unable to offer any advice or treatment until I am completely satisfied that I know what I'm dealing with! The herb profiles and treatment suggestions on this website will help enable you to choose which herbs might be appropriate for minor ailments. For more serious or chronic conditions you should seek professional advice. This is particularly important if you are taking medication from your doctor or pharmacist, as some herbs can interact adversely with other drugs. If you would like to have a consultation with a medical herbalist then you should click here then scroll to 'Professional Organisations' at the bottom of the page to find a qualified practitioner in your area.
Christine Haughton, MA MNIMH MCPP FRSPH
Wold Farm, West Heslerton, Malton, North Yorkshire YO17 8RY, UK
Last updated 27th November 2014 ęPurple Sage Botanicals