The First International Workshop on Adverse Drug Reactions and Lipodystrophy in HIV took place in June 1999. Speakers discussed various theories on the causes of lipodystrophy, including mitochondrial toxicities. Factors including gender, age, and disease stage seem to affect the risk of developing lipodystrophy, or fat redistribution syndrome. Some studies are investigating the relationship between lipodystrophy and HIV drugs, such as the use of d4T, a nucleoside analog reverse transcriptase inhibitor (NRTI). Contact information is provided.