Objective： To observe the relaxant effect of Aike Mixture （艾可合剂, AKM） on isolated bladder and prostatic urethral smooth muscle of rabbits. Methods： The isolated bladder and prostatic urethral smooth muscle from male rabbits were placed Jn a Magnus bath and smooth muscle contraction was measured using a biological signal acquisition and analysis system. The effects of AKM in combination with methoxyamine, carbachol and CaCl2 on the contractile tension of muscle strips were determined by cumulative dosing. Results： AKM dose-dependently reduced contractile tension of bladder trigone smooth muscle （r=0.831, P〈0.05）, reduced contractile wave amplitude （r=0.837, P〈0.05） and decreased contractile frequency （r=-0.917, P〈0.01）. AKM signJfJcantly inhibited the increases in smooth muscle contraction induced by methoxyamine, carbachol and CaCl2. Conclusion： AKM dose-dependently inhibited the contraction of rabbit isolated bladder and prostatic urethral smooth muscle by antagonizing α1-adrenergic receptors and M-cholinergic receptors.
