Objective To investigate the bacteriostasis effect of Huangbai acne ointment. Methods Tube fold dilu-tion method and plate method were used to observe the bacteriostasis effect of Huangbai acne ointment water de-coction, ceftriaxone, and vitamin A acid cream on Staphylococcus aureus and Staphylococcus epidermidis in vitro.Results The minimum inhibitory concentration(MIC)of Huangbai acne ointment water decoction, ceftriaxone, andvitamin A acid cream against Staphylococcus aureus was 125mg∕mL, 4 μg∕mL, and 500mg∕mL, respectively. The MIC of...