Furosemide (Lasix) & Benazepril
Together for Dogs with Heart Disease
A foundational combination in heart failure management. Furosemide removes fluid while benazepril reduces the hormonal response that causes fluid retention.
Why are these prescribed together?
Heart failure triggers the renin-angiotensin-aldosterone system (RAAS), causing fluid retention and blood vessel constriction. Furosemide directly removes excess fluid, while benazepril blocks RAAS to prevent the body from compensating by retaining even more fluid. Without an ACE inhibitor, furosemide doses often need to keep increasing.
How they interact
Both can lower blood pressure. Benazepril can slightly reduce kidney blood flow, and furosemide can cause dehydration - together, kidney monitoring is important. However, benazepril is actually kidney-protective in most cardiac patients.
Dosing and timing tips
Furosemide timing depends on dose frequency (1-3 times daily). Benazepril once or twice daily, flexible timing. Can be given together.
Monitoring needed
Kidney values (BUN, creatinine) every 1-3 months initially, then every 3-6 months when stable. Electrolytes (potassium, sodium, magnesium). Body weight to assess fluid status. Blood pressure if possible.
Important warnings
Ensure constant access to fresh water
Watch for signs of dehydration: dry gums, skin tenting, lethargy
If your dog stops eating, contact your vet - could indicate kidney changes
Used for these conditions
Learn about each medication
Other combinations with these drugs
Cardiac protocols stack up over time. These pages cover the other combinations your dog may end up on.
Pimobendan + Furosemide & Benazepril
The 'triple therapy' - the standard of care for dogs in congestive heart failure. Most cardiac dogs in Stage C will be on all three of these medications.
Furosemide (Lasix) & Enalapril
Same rationale as furosemide + benazepril. Enalapril blocks the hormonal response that causes fluid retention while furosemide directly removes excess fluid.
Furosemide (Lasix) & Spironolactone
A complementary diuretic combination. Furosemide is a powerful loop diuretic that depletes potassium, while spironolactone is a mild potassium-sparing diuretic that helps balance this effect.
Pimobendan (Vetmedin) & Benazepril
A standard combination for managing heart failure. Pimobendan strengthens the heart while benazepril (an ACE inhibitor) reduces cardiac workload by relaxing blood vessels.
Important:Never start, stop, or adjust your dog's medication without consulting your veterinarian. The dosages and protocols described here are general references - your vet will determine the right approach for your dog based on their individual condition, weight, and overall health.