BenzaClin is a topical gel used to treat acne.
Full prescribing information is available at:
http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?id=9296
Check out Wikipedia for more user-friendly information:
http://en.wikipedia.org/wiki/Benzaclin
Many readers have reported grave difficulties with oral clindamycin:
These should be less likely with the topical gel, but some people may still have side effects.