本品含苦杏仁苷（C20H27NO11）不得少于3.0%。                
        【性味与归经】    苦，微温；有小毒。归肺、大肠经。                                                
        【功能与主治】    降气止咳平喘，润肠通便。用于咳嗽气喘，胸满痰多，    血虚津
枯，肠燥便秘。                                                                                                                            
        【用法与用量】    4.5～9g，生品入煎剂宜后下。                                                                  
        【注意】    内服不宜过量，以免中毒。