title: [Irritative activity of a new anti-inflammatory agent 4-(p-chorophenyl)-2-phenyl-5-thiazoleacetic acid (CH-800) on the gastrointestinal tract in rats (author's transl)].
abstract: A single oral administration of CH-800 induced a dose-dependent irritation of the stomach and intestine. As determined from the UD50 value (the dose inducing ulceration by 50%), the potency of gastric irritation was as follows; indomethacin greater than diclofenac Na greater than ibuprofen greater than aspirin greater than CH-800 greater than phenylbutazone. Repeated administrations of CH-800 for 5 days induced a gastric irritation when given in doses from 3 to 100 mg/kg, however, the response was not dose-related. In contrast, the irritation of intestinal mucosa seen with CH-800 administration was dose-related. The degree of gastric or intestinal irritation seen with dosing of other drugs was as follows; indomethacin greater than diclofenac Na greater than ibuprofen greater than aspirin greater than phenylbutazone or indomethacin greater than CH-800 = diclofenac Na greater than ibuprofen greater than phenylbutazone, respectively. CH-800 given for 5 days significantly delayed the healing of active ulcers and the healed ulcers showed a tendency toward re-ulceration. However, the irritating activity of phenylbutazone, diclofenac Na and ibuprofen was more potent than that of CH-800. Thus, CH-800 appears to have a rather weak irritative activity on the gastrointestinal tract of rats without ulceration, in contrast to other commonly clinically prescribed drugs.
mesh_terms: D000085:Acetates / Q000008:administration & dosage / Q000494:pharmacology*; D000284:Administration, Oral; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000009:adverse effects*; D001241:Aspirin / Q000009:adverse effects; D004008:Diclofenac / Q000009:adverse effects; D004064:Digestive System / Q000187:drug effects*; D007052:Ibuprofen / Q000009:adverse effects; D007213:Indomethacin / Q000009:adverse effects; D007509:Irritants; D008297:Male; D010653:Phenylbutazone / Q000009:adverse effects; D051381:Rats; D013276:Stomach Ulcer / Q000139:chemically induced; D013844:Thiazoles / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D000085:Acetates; D000893:Anti-Inflammatory Agents; D007509:Irritants; D013844:Thiazoles; C006124:fentiazac; D004008:Diclofenac; D010653:Phenylbutazone; D001241:Aspirin; D007052:Ibuprofen; D007213:Indomethacin