Is it really okay to put Tenactin on a cat knowing she’ll lick it off or is an e-collar a must? A vet recommended this for her ringworm in place of sulfur dips, but I don’t want to permanently e-collar her until it clears up. Help!

Is it really okay to put Tenactin on a cat knowing she’ll lick it off or is an e-collar a must? A vet recommended this for her ringworm in place of sulfur dips, but I don’t want to permanently e-collar her until it clears up. Help!