Leukogenic effect of complex indigo powder

Oral administration of complex indigo powder, an anti-scrofula powder, at a daily dose of 0.5 g/kg, raised the leukocyte count in rats injured by irradiation, but prophylactic administration could not prevent the leukopenia induced by irradiation. This dosage did not affect growth in rats and oral doses up to 6 g/kg did not induce any toxic reactions in mice.