Treatment EC50 (mg/mL) Emax Control 0.048 ± 0.005 55.7 ± 6.1 EEP (100 μg/mL) 0.246 ± 0.073 π 9.4 ± 2.7π

EEP: Ethanolic Extract of Propolis; Emax: (% of contractions induced by 0.1 mM ACh) Values represent mean ± S.E. of 5 preparations. πSignificantly different when compared with the control group respectively using Student t test (P<0.05).

Table 2: Effect of EEP on EC50 and Emax of antigen-induced contractions of passively sensitized guinea pig isolated tracheal zigzag preparations.

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