A baseline laboratory tests for: packed cell volume, white blood cell count with differentiation, platelet estimation, liver function (aspartate aminotransferase [SGOT], alanine aminotransferase [SGPT]), renal function (serum creatinine), blood urea nitrogen (BUN), pregnancy test (females only), HIV/AIDS, and hepatitis B and C tests will be done two weeks prior to dosing. Volunteers may not consume alcohol, tobacco, caffeine containing products, herbal or other drugs during the study.