内服:研末,3~4分。外用:研末撒或调搽。①治吐血,咯血:锅底墨炒过,研细,井华水服二钱,连进三服。(《济急仙方》)②治产血不下:锅底墨烟,热酒服二钱。(《生生编》)③治舌肿起如猪胞:釜下墨末,以酢敷舌上下,脱去更敷。若先决出血汁,竟,敷之弥佳。(《千金方》)④治聤耳,耳中痛,脓水出:月下灰吹满耳,令深入,无苦,即自出。(《补缺肘后方》)⑤治孩子口内疮:锅底墨细研,无时,指头擦之。(《普济方》)