The vet gave my cat what should be prednisone 5 mg. They look different from his last script. They are oblong and white with PTS on one side. I should have asked the vet, but didn't notice until later. His last script, the pills were white and round. Both can easily be broken in two pieces, which I do. My cat has asthma and when he needs help breathing, I give him 2.5 mg.