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Effect of ruthenium red on capsaicin‐induced Evans blue exudation in the rat pharynx. Ruthenium red was administered into the oral cavity 30 min. before capsaicin application. Pretreatment with ruthenium red (8.5 and 85 mg/ml) significantly inhibited the Evans blue exudation induced by capsaicin (P<0.01). Values are means±S.E. from 5–10 experiments. *P<0.05 and **P<0.01 versus capsaicin.
