The etiopathogenesis of acne vulgaris, a common disorder of youth and
adolescence, includes four primary processes: hyperkeratinization (plu
gging) of the pilosebacous follicles, increased testosterone levels, b
acterial colonization with Propionibacterium acnes, and inflammation.
No single agent has yet been developed that addresses all of these fac
tors, Combination regimens, therefore, which usually include an antibi
otic and an agent to reduce follicular plugging, have become the mains
tay of treatment, Despite a relative dearth of new treatments for almo
st a decade, recent research has produced a number of new significant
oral and topical agents, Azelaic acid, a naturally occurring dicarboxy
lic acid analogue, has shown promise, and a group of retinoids that in
clude adapalene, tazarotene, and reformulations of tretinoin represent
new and forthcoming agents for topical treatment of acne vulgaris, So
me studies indicate that several of these agents are associated with l
ess skin irritation than previous formulations while they retain poten
t comedolytic activity. Adapalene also possesses significant anti-infl
ammatory activity.