Carbolic acid is an efficient parasiticide, and is largely used in destroying the fungus of ringworm and of the skin disease known as pityriasis versicolor.
2
It may also be employed as a parasiticide in ringworm and similar conditions.
3
While sold as a heartworm medication for dogs and cats, company literature describes it as a parasiticide, because it also effective for the treatment of fleas and ear mites, as well as heartworm.