Propoxyphene, also known as Darvocet, has not been discontinued (that Im aware of).Yes they have discontinued marketing Darvocet, the FDA is banning Darvocet and Darvon because of death related side...
A substitute is a person or thing that takes the place or function of another. In cooking, it would be an ingredient which can replace another. For example, if you are baking cookies and your recipe...