Bitter leaf extract (Andrographis paniculate (Burm.f) Wall. Ex Ness) contains secondary metabolites andrographolide and quercetin which have potential antibacterial activity. This research aims to determine the nanoemulsion formulation with a combination of Tween 80 and Ethanol 96% concentration on the activity of Propionibacterium acnes and the stability of ICH Q1A (R2). Data analysis in this …