Hi. Thanks for the update.
Vetoryl (trilostane) is a very safe product. Actually has been shown to be better than using Lysodren. The main side effects are lethargy, inappetence, and mild electrolyte abnormalies, but they are all related to the steroid withdrawl rather than adverse effects from the medication. And just like any medication, can potentially cause vomiting and diarrhea.
This medication is metabolized by the liver, like 90% of the drugs, and so it can potentially cause problems if a patient already has liver disease. But again, unlikely.
It is a competitive inhibitor of 3-beta hydroxysteroid dehydrogenase thereby reducing synthesis of cortisol, aldosterone and adrenal androgens. Inhibition is reversible and apparently dose dependent.
You should expect symptom relief within a week. (Decrease in water consumption, decrease urination, decrease appetitie)
Having said all these, I would suggest to have an ultraosund performed before starting medication, to confirm the adrenal tumor. With adrenal tumor, it is recommended to have surgery done rather than using medication. Oral cushing's medication are not usually used for adrenal tumors
Hope this helps. Please let me know if you have any question or concerns. Thanks.