The most common side effects are poor appetite, lethargy, diarrhea, shortness of breath, weakness, and ataxia (lack of muscle control and coordination). If side effects occur, consult your veterinarian. The safety of VETMEDINยฎ Solution (pimobendan oral solution) inodilator has not been established in puppies younger than 6 months of age, or in breeding, pregnant or lactating dogs. For more information, please see full prescribing information.