【炮制】    洗净，镑片或锉成粗粉。                                                                                
        【性味与归经】    苦，寒。归心、肝经。                                                                        
        【功能与主治】    清热解毒，凉血，定惊。用于温病高热，神昏谵语，发斑发疹，
吐血衄血，惊风，癫狂。                                                                                                            
        【用法与用量】    15～30g  ，宜先煎3  小以上。                                                            
        【贮藏】    置干燥处，防霉