We went through knee surgery with our guy. Now, six months later he still needs Carprofen and Tramadol. Getting the dosage right takes some work on our part. (Tramadol smells and tastes awful to many dogs, we buy Greenie or Milk Bone pill pockets to mask the taste and smell. Tramadol can run over $200 a month, but we learned we can buy him a prescription plan from Walgreens, (in his name $32/year) which allows us to fill his Tramadol needs for about $75 per month.