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Local antagonist effects of oxilorphan against local U50,488 (top) and bremazocine (bottom) in 46°C water in the presence of capsaicin. The labels cap + U50 and cap + brem represent the effects of coadministration of capsaicin (0.1 mg) with U50,488 (100 μg) and bremazocine (3.2 μg) in the tail, respectively. Other details are as in Fig. 1.
