The following number of animals was treated with BDF: 0.4 mg/kg n=16; 1.0 mg/kg n=6. Vehicle-treated rats (n=15) received the same volume of solvent.
A – a single dose of BDF was administered via oral gavage to rats in the doses shown. Urine was probed with a DiaScreen reagent strip (dipstick) at 30 min and hourly thereafter up to 4 hours after BDF administration. Results were graded using a semiquantitative scale of 0–3+. Score 0 was designated for no hematuria, score 1+ for mild hematuria, score 2+ for moderate hematuria and score 3+ for severe hematuria.
B – Hematocrit was determined in the blood samples at 30 min, 2 and 4 hours after BDF treatment.
C – free hemoglobin was measured in the serum using the Hemoglobin Assay Kit.
D – gross appearance of blood samples after 0.4 mg/kg (rat 1) and 1.0 mg/kg (rat 2) BDF treatment. Gross hemolysis was evident at 30 min and 2 hours after BDF administration.