There can be those worms in the proventriculus, I think I read "flubendazole" for worms there, and wondered if miconazole was similar. So it is not. Hoping she can clear them outLovely cat!
No, miconazole is against fungi=thrush=candida=sour crop.
The fenbendazole is against worms and should kill roundworms whereever they are in the gut. It is possible that the reason she got blocked up is that she had a lot of worms and they died with her first dose of fenbendazole and the blockage is dead worms.
I have been looking for worms in her poo and haven't seen any but as she is out and about I may have missed them.