Are pregnant or breast-feeding

Need to take certain medications that have systemic myelosuppressive, neurotoxic, pancreatotoxic, hepatotoxic or cytotoxic potential

Have active alcohol or substance abuse which may prevent compliance or increase risk of developing pancreatitis

Have certain other conditions or prior treatments that might interfere with study continuation

Need to take certain medications that should not be taken with EFV

Rollover Study for Zerit (Stavudine) ER Studies (-096, -099)