Gastric administration of encapsuled garlic powder to anaesthetized dogs induced dose-dependent (2.5 to 15 mg/kg) natriuretic and diuretic responses which reached maximum 30–40 min after garlic administration and decreased to basal levels after 100–150 min. A simultaneous decrease in arterial blood pressure was observed which continued past the 250 minmark. High garlic doses (15 and 20 mg/kg) provoked bradycardia and T-wave inversion during the first 10–15 min of the experiment with recordings returning to normal and staying normal throughout the remainder of the experiment.