anti-inflammatory, analgesic and antiulcer properties of porphyra vietnamensis

objectives: aim of the present work was to investigate the anti-inflammatory, analgesic and antiulcer effects of red seaweed porphyra vietnamensis (p. vietnamenis). materials and methods: aqueous (por) and alcoholic (pe) fractions were successfully isolated from p. vietnamenis. further biological investigations were performed using a classic test of paw edema induced by carrageenan, writhing induced by acetic acid, hot plate method and naproxen induced gastro-duodenal ulcer. results: among the fractions por showed better activity.  por and pe significantly (p < 0.05) reduced carrageenan induced paw edema in a dose dependent manner. in the writhing test por significantly (p < 0.05) reduced abdominal writhes than pe.  in hot plate method por showed better analgesic activity than pe. por showed comparable ulcers reducing potential (p<0.01) to that of omeprazole, and has more ulcer reducing potential then pe. conclusions: the results of this study demonstrated that p. vietnamenis aqueous fraction possesses biological activity that is close to the standards taken for the treatment of peripheral painful or/and inflammatory and ulcer conditions.