title: [Pharmacological study of kako-bushi-matsu: analgesic action and acute toxicity].
abstract: The analgesic effect and the acute toxicity of a medical drug "kako-bushi-matsu" (S-01), which was produced through several processing of raw aconite roots, were examined in comparison with those of ibuprofen, indomethacin and aspirin. S-01 (p.o.) inhibited the acetic acid- and phenylquinone-induced writhing dose-dependently. From the ED50 values, indomethacin showed more potent inhibitory action on the phenylquinone-induced writhing than on the acetic acid-induced writhing. Ibuprofen and aspirin showed the same tendency as indomethacin. The potency of the writhing inhibition by S-01 was almost to the same degree in both writhing methods. In the tail pressure method, S-01 raised the pain threshold ratio to almost the same degree as ibuprofen did. In Randall-Selitto's method, the analgesic effect of S-01 on inflamed foot was less than that of ibuprofen. In the normal foot, S-01 raised the pain threshold ratio dose-dependently, but ibuprofen did not influence the pain threshold ratio. On adjuvant-induced arthritic pain, S-01 and ibuprofen had an analgesic action, and this action of S-01 was less than that of ibuprofen. The oral LD50 value of S-01 was more than 10,000 mg/kg in mice and rats of both sexes. The above evidence indicates that S-01 has analgesic action and suggests that the mode of the analgesic action of S-01 may differ from those of ibuprofen, indomethacin and aspirin, which inhibit prostaglandin biosynthesis.
authors.affiliation: Research Section, Sanwa Shoyaku Co., Ltd., Utsunomiya, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Murayama
authors.forename: Y
authors.initials: Y
authors.lastname: Namiki
mesh_terms: D000700:Analgesics; D000818:Animals; D001241:Aspirin / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000494:pharmacology* / Q000633:toxicity; D005260:Female; D007052:Ibuprofen / Q000494:pharmacology; D007213:Indomethacin / Q000494:pharmacology; D007928:Lethal Dose 50; D008297:Male; D051379:Mice; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D000700:Analgesics; D004365:Drugs, Chinese Herbal; D001241:Aspirin; D007052:Ibuprofen; D007213:Indomethacin