Vincristine Sulfate Injection, USP (vincristine sulfate) is the salt of an alkaloid obtained from a common flowering herb, the periwinkle plant (Vinca rosea Linn). Originally known as leurocristine, it has also been referred to as LCR and VCR. The molecular formula for Vincristine Sulfate, USP is C46H56N4O10H2SO4. It has a molecular weight of 923.04.

VINCASAR PFS (vincristine sulfate injection, USP) is the salt of an alkaloid obtained from a common flowering herb, the periwinkle plant (Vinca rosea Linn.). Originally known as leurocristine, it has also been referred to as LCR and VCR.