Below are the main rubriks (i.e strongest indications or symptoms) of Usnea Barbata in traditional homeopathic usage, not approved by the FDA.
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Usnea barbata. Tree-hair. Tree-moss. N. O. Lichenes. Tincture.
An article by M. B. in U.S. Med. Invest. (quoted New, Old, and Forgotten Remedies) gives an observation by the writer, who ate a little of the "moss" and had in consequence a severe congestive headache which compelled him to give up his work and go to bed. He got to sleep and woke very well next morning. Two young ladies out picking cranberries had headache from riding in the hot sun and were compelled to lie down. Usn. b. Ø, one drop in a tumbler of water, a teaspoonful to be taken at once and repeated in fifteen minutes. The second dose stopped the pain. A young married lady subject to headache for five years.
was almost frantic with the pain. Usn. b., as above, cured in one or two doses. SYMPTOMS.