Drugs commonly used are diuretics (e.g. furosemide to remove fluid that has
accumulated in the abdomen or lungs and can cause your dog to drink more water and urinate more), angiotensin - converting enzyme inhibitors (ACE inhibitors to relax
blood vessels to allow more efficient
blood flow from the heart and to ease the workload
on the heart) and positive inotropic agents (e.g. pimobendan to increase the strength of contractility of the heart muscle tissue).