I am afraid that it may seem as though I am harping about a "small" point :o, but I just wanted to clarify for you that compounded drugs are not the same thing as generics. I just posted another reply about compounded drugs on another thread this morning, and so I wanted to offer this additional info to you, as well.
In the U.S., both brandname and generic meds are made by pharmaceutical companies according to FDA guidelines and regulations. Generic equivalents are not permitted until the original patent has expired on the brandname drug. Dechra still holds an active patent on Vetoryl, so no generics are being made at this time.
Compounded versions of trilostane are prepared by individual pharmacies based upon the prescription needs of each specific dog. Depending upon the manner in which the vet writes the Rx, the compounded version may or may not use brandname Vetoryl as the effective ingredient. As is the case with your Dr. Wilson, there are many vets who feel very comfortable with prescribing compounded versions of the drug, and we have many members here who are using them with great success. But I do think it is important for people to know that there is a difference between a generic drug and a compounded drug. Here's a related quote from the American Veterinary Medical Association:
"Veterinary Compounding" Brochure
MarianneQuote:
Compounded drugs are not the same as generic drugs. Generic drugs are FDA-approved. To receive FDA approval, generic drugs must demonstrate bioequivalence to the "pioneer brand name" drug. Generic drugs can be identified by the ANADA number on their label and by cross-checking with a drug reference, e.g. the FDA Green Book of Approved Animal Drug Products. In contrast, compounded drugs are extemporaneously prepared products that lack FDA approval. The concept is that compounded drugs with their possible flaws are better than no drug at all and suitable for a small patient population.

