Benzoyl peroxide/clindamycin

Benzoyl peroxide/clindamycin
Combination of
Benzoyl peroxide  ? Class
Clindamycin phosphate Antibiotic
Clinical data
MedlinePlus a603021
Licence data US FDA:link
Pregnancy cat.  ?
Legal status Prescription only
Routes Topical
ATC code D10AE51
 YesY(what is this?)  (verify)

The drug combination benzoyl peroxide/clindamycin is a topical gel used for the treatment of acne. It is sold under the trade names Duac (by Stiefel Labs) and BenzaClin (by Sanofi Aventis). Both contain 1% clindamycin phosphate and 5% benzoyl peroxide and are prescription drugs.


Side effects

Common side effects are peeling, itching, redness, dryness, burning, and dermatitis. Prolonged exposure to natural or artificial sun light (UV rays) is not recommended because the gel can cause photosensitivity. Also, benozoyl peroxide may cause bleaching of hair, clothing, etcetera, and topical clindamycin may rarely cause diarrhea or colitis.

Mode of action

Its activity is derived from the combined anti-bacterial action of clindamycin and from the comedolytic and anti-bacterial actions of benzoyl peroxide. Both ingredients have been shown to reduce the number of acne lesions with statistical significance.

Clindamycin phosphate is a water-soluble ester of the semi-synthetic antibiotic, clindamycin, which is synthesized from lincomycin. It prevents the Propionibacterium acnes bacteria from replicating by preventing it from making vital proteins. Benzoyl peroxide also kills P. acnes, but since it is an oxidizer, not an antibiotic, it is not subject to P. acnes resistance like clindamycin is. Also, benzoyl peroxide dries out the area, preventing clogged pores and is a keratolytic agent.

How supplied

Duac comes supplied in two ways, in a 45 gram tube, and in the DUAC CS Convenience Kit, containing the 45 gram tube and a bottle of SFC Lotion, a soap-free cleanser that is applied to either wet or dry skin then rubbed off with a tissue or soft cloth.

External links

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