Its effects depend in large part upon the individual using them.  For example, some girls I know get really angry while taking birth control pills due to the hormone supplementation among other things.  But for girls between the ages of 12 and 24 who suffer from acne the most as well as older women who are still in that area of life, you could actually benefit from Ortho Tri-Cyclen in your battle against acne. 

IT is a birth control pill using progesterone and estrogen, and it has been shown to actually decrease testosterone levels and accordingly decrease excess acne levels in women who use it.  Now androgens and testosterone in general are not bad. It’s when they reach excessive levels.  Women in general are extra sensitive to these excess levels, and so they could suffer a myriad of different problems because of it including but not limited to acne.  So balancing this out allows you to get the greater balance you need in terms of testosterone levels and therefore clear many acne problems in general.