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Hi. Welcome to Just Answer. My name is***** and I've been a veterinarian for 15 years. Are you sure it was just one 10 mg lisinopril? Is he on any other medications or does he have any other known health issues?
Lisinopril is a medication that can / is used in veterinary medicine for the treatment of heart failure. It actually is dosed at 0.5 mg / kg when it is used once to twice a day. For a 65 pound dog that was being started on the medication, they could be given around 14 mg once to twice a day. So for an otherwise normal dog to just eat one 10 mg tablet, this shouldn't be a bad situation by any means and no specific therapy is needed.