
It is upsetting when you find out that your dog is ill & that there is nothing that can be done to cure it but the tablets you mention will help him cope
There are things you can do to make sure that you are helping your dog as much as possible, like keeping their weight at an acceptable level, I had suggested to me giving Vit E to help. not exercising in too much heat, not exercising too much for the age of the dog.
Remember your dog will not be worried about his heart he might cough a little & rest more but the rest is part of growing old. two of my Cavaliers have murmurs Grade 2 is on no meds but three monthly check ups & the grade three is on meds & two monthly checks ar present
There is nothing more you can do except go on loving him & caring for him & take each day as it comes