Effects of chlorothiazide on urinary excretion of calcium in clinically normal dogs
1992
Lulich, J.P. | Osborne, C.A.
Administration of thiazide diuretics has been recommended to prevent calcium oxalate urolith development in dogs. To evaluate the effects of thiazide diuretics in dogs, 24-hour urine excretion of calcium was measured in 6 clinically normal Beagles after administration of chlorothiazide (CTZ) for 2 weeks, administration of CTZ for 10 weeks, and administration of calcium carbonate and CTZ for 2 weeks. Compared with baseline values, 24-hour urine calcium excretion did not decrease after CTZ administration. When CTZ was given at a high dosage (130 mg/kg of body weight), urinary calcium excretion was significantly (P < 0.04) higher than baseline values. Based on these observations, we do not recommend CTZ for treatment or prevention of canine calcium oxalate urolithiasis.
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