Its not substitution for medical advice, but yes, there have been successful accounts when ivermectin and fenbendazole are used together. Link below.
Ivermectin - Fenbendazole - Quercetin (elderberries) - Vitamin C and D, and Curcumin (turmeric)
https://deeprootsathome.com/ivermectin-fenbendazole-for-tumors-ibd-alzheimers-stories/