Spironolactone
Spironolactone is very effective in decreasing oil production and improving female hormonal acne. This is acne that is typically located on the lower face, cheeks, chin, jawline, neck, back, or chest, and may flare with your menstrual cycle. It works by blocking the testosterone receptors in the skin.
How effective is it? In one study 91% of females had significant improvement, and two thirds of those women experienced greater than 90% improvement in their acne!