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Effect of benazepril and pimobendan on serum angiotensin‐converting enzyme activity in dogs
Authors:J. N. King  C. Christinaz  G. Strehlau  J. Hornfeld
Affiliation:1. Companion Animal Development, Elanco Animal Health, Basel, Switzerland;2. Centre de Recherche Santé Animale, Elanco Animal Health, St Aubin, Switzerland
Abstract:To support their combined use, the objective of the study was to evaluate the effects of benazepril and pimobendan on serum angiotensin‐converting enzyme (ACE) activity in dogs. A total of 48 healthy beagle dogs were randomized into four groups (= 12 per group) in a parallel‐group design study: A (control, placebo twice daily (BID)); B (0.5–1.0 mg/kg benazepril once daily (SID) in the morning, placebo in the evening); C (0.25–0.5 mg/kg benazepril BID); D (0.25–0.5 mg/kg benazepril and 0.125–0.25 mg/kg pimobendan, both BID). The test items were administered orally for 15 days. Serum ACE activity was measured on days 1 and 15. Groups B, C and D had significantly lower average serum ACE activity compared to baseline and to the control group, on both days 1 and 15. There were no significant differences in average ACE activity between groups B, C and D. Noninferiority of group C to B was demonstrated. In conclusion, 0.25–0.5 mg/kg benazepril administered BID produced noninferior inhibition of serum ACE activity compared to 0.5–1.0 mg/kg benazepril dosed SID. Pimobendan had no significant effect on benazepril's action on serum ACE activity. The results support the use of benazepril BID in dogs and in combination with pimobendan.
Keywords:ACE inhibitor  angiotensin‐converting enzyme  benazepril  dog  pimobendan
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