Tippens was reportedly participating in an immunotherapy clinical trial at the MD Anderson Cancer Center at the time he began using fenbendazole. Immunotherapy is an advanced form of cancer treatment that boosts the body’s immune system to fight cancer cells. Being that his experiment is n=1, let alone no control patient nor enough data to draw a valid conclusion as to whether it was the immunotherapy clinical trial for his non-small cell lung cancer which is different then pancreatic cancer.

Fenbendazole is formulated for veterinary use. The human equivalent biosimilar drug is Mebendazole. Here is what happens when people with no pharmacology background experiment on themselves with products not formulated for humans-

Liver damage from Fenbendazole
https://pubmed.ncbi.nlm.nih.gov/38706451/
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Think carefully as drug/drug and drug/supplement interactions can have consequences. Damage to the liver would mean having to pause chemo. Permanent damage would terminate cancer treatment. Bad decisions can have bad consequences and there might not be a “do-over” moment.