For the first few weeks after stopping use of the Duac
gel, you will probably experience a moderate breakout. However, this should not discourage you.
The Duac treatment is a combination of clindamycin and benzoyl peroxide; these chemicals work to manage the bacteria on your skin, killing it and allowing for a healthier, cleaner complexion. Any anti-bacterial medicine becomes ineffective after a while, as bacteria evolves and then resists the compounds originally intended to relinquish it.