Stavudin var karcinogent hos mus (levertumorer) og rotter (levertumorer, cholangiocellulær, hepatocellulær, blandet hepatocholangiocellulær og/ eller vaskulær; og urinblærekarcinomer) ved meget høje ekspositionsniveauer.
Stavudine was carcinogenic in mice (liver tumours) and rats (liver tumours: cholangiocellular, hepatocellular, mixed hepatocholangiocellular, and/ or vascular; and urinary bladder carcinomas) at very high exposure levels.