@davidrhunt45, welcome. I'm sorry to hear that prostate cancer has returned. That must be so discouraging and lead you to explore alternative options.

I moved your question about ivermectin and fengendazole to this existing discussion. I strongly recommend that you read it from the beginning.
- Firsthand Experience with Fenbendazole, Ivermectin, Lactoferrin? https://connect.mayoclinic.org/discussion/firsthand-experience-with-fenbendazole-ivermectin-lactoferrin/

This is what Mayo Clinic experts would like you to know:
- Mayo Clinic on use of ivermectin or other dewormers to treat cancer https://connect.mayoclinic.org/blog/about-connect/newsfeed-post/mayo-clinic-on-use-of-ivermectin-or-other-dewormers-to-treat-cancer/

Important
It is NOT safe to take ivermectin used in veterinary medicine. Please talk to your doctor before taking any over-the-counter medications or supplements that claim to fight or cure cancer.

May I ask where you have heard about fenbendazole and ivermectin for treatment of cancer? Was this suggested by your oncologist or something you read about?

@davidrhunt45 If you have PCa in your seminal vesicles you have a more aggressive case.
You need proven medical treatment, not an internet snake-oil cure all. Also, Ivermectin can seriously damage your liver.
Phil