So a little bit of background on my acne,

I started noticing my acne about 5 years ago, since then I have used numerous products and eventually found the best product for me. This product being The Regimen. I've used the Regimen for about a year now, and it has cleared my face up dramatically. However, now when I use it, my face is consistently drying out. (Not necessarily flaking, but extremely dry) I'm wondering if I should continue to use the regimen, or if I should slowly stop using it and see how my face/acne reacts? Please share your thoughts.

EDIT: I always lotion and moisturize my face as a last step of the Regimen.