Vet's Best Allergy Itch Relief Shampoo moisturizes skin and soothes incessant itching. Essential botanical oils calm skin irritation. Vet's Best Allergy Itch Relief Shampoo washes away allergens attached to fur & skin and can be used as often as necessary without drying skin. Key ingredients are oatmeal, d'limonene and tea tree oil. Use of this shampoo will not affect topical flea control products.