Hello @kdave. Welcome to Mayo Connect. My associates and I on this web site are not licensed medical professionals, so it's not proper for us to make judgments about what's happening with your dad. However, I can say a few things as a layman about the medications you listed. Hopefully this will be helpful to you.

I have taken three of those drugs in the past. 1) Carvedilol treats high blood pressure and irregular heartbeats. Its starting dosage is 6.25mg, as on your list. I take it to stabilize my heartbeats in connection with atrial fibrillation. 2) Spironolactone is a blood pressure treatment. 3) Furosemide (Lasix) is a diuretic used to treat high blood pressure.

The fourth medication, Ascarol, is used to treat suspected infection by parasites, often those picked up from polluted water. It is a common drug in Ecuador.

I hope this information is helpful to you. I further hope that your dad has a good conversation with his doctors about his heart problem, their diagnosis, their treatment plan, and their advice for his journey home. Can I provide any more information? Martin