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at time of writing, Student, College of Pharmacy, University of Kentucky, Lexington, KY; now, Clinical Staff Pharmacist, St. Joseph's Hospital, Lexington
Associate Professor, Pharmacy Practice and Science, College of Pharmacy; Director, Drug Information Center, University of Kentucky Chandler Medical Center
Reprints: Kelly M Smith PharmD, University of Kentucky Drug Information Center, 800 Rose St., C113, Lexington, KY 40536-0293, fax 859/323-2049, ksmit1{at}email.uky.edu
OBJECTIVE: To assess the utility and safety of isotretinoin in the treatment of granuloma annulare (GA).
DATA SOURCES: Searches of MEDLINE (1966-January 2003), EMBASE (1989-January 2003), International Pharmaceutical Abstracts (1970-2002), and Allied and Complementary Medicine Database (1985-2002) were conducted. Key terms included granuloma annulare, isotretinoin, retinoids, and antioxidants.
DATA SYNTHESIS: Isotretinoin may have proliferative and inhibitory effects on collagen synthesis that improve GA symptoms. Cases reporting use of isotretinoin in the treatment of GA were reviewed. Several reports detail the successful use of isotretinoin 0.5-1 mg/kg/day, primarily in the disseminated form of the disease. However, some patients required dosage decreases in response to drug-related liver function test elevations, and 2 instances of drug failure were identified.
CONCLUSIONS: Isotretinoin should be reserved for patients with disseminated or refractory GA. Potential serious adverse effects associated with its use require careful monitoring.
Key Words: granuloma annulare, isotretinoin, retinoids
Published Online, January 23, 2004. www.theannals.com, DOI 10.1345/aph.1D312