I recommend the switch to 2.5%. It does the same thing that 10% does without the terrible irritation that goes along with using a higher concentration of BP. The break out isn't because of the 10%, usually the first few weeks is like a rollercoaster ride with your skin, you breakout and sometimes your are clear, this is all a process your skin needs to adjust to.

I agree with Nicmic...2.5% is the ideal formula...much gentler on skin than the harsh 10% BPs while still kicking plenty of p.acne ass!! The treatment is purging all the latent acne so periodic breakouts that come and go are very common in the early weeks of treatment. But it can take many more weeks to achieve consistently clear results.

2.5% !! when i first started i used 2.5% and 10% on spot treatments. you broke out because it's your first 4 weeks. keep going!