Abstract: The effects of 8-Hydroxyquinoline Sb complex (8-hq·Sb) on the Cardiac and liver functions of rabbits and the absorption and elimination of antimony were studied after oral administration in a 14-day course. Tartar emetic was studied simultaneously for comparison. 8-hq-Sb or tartar emetic was administered orally to rabbits. The animals were sacrificed at different time intervals and the antimony levels in blood, liver, urine and feces were determined by a modified Maren's method. Electrocardiograms and bromsulphlein tests were carried out before medication, on the 7th and 14th days during treatment and also one week after cessation of medication. Generally speaking, the absorption of antimony in rabbits are similar for both compounds. In the 8-hq-Sb group, the elimination of antimony in feces and urine during the course of administration amounts to 64% and 3% of the total antimony administered respectively. There is no significant change in EKG before and after the administration of 8-hq-Sb. On the other hand, the BSP test seems to indicate that 8-hq-Sb causes less damage to the liver than tartar emetic.