Product Details Apply First Companion Epsom Salt Poultice to painful or swollen muscles, legs, joints or insect bites. First Companion Epsom Salt Poultice can be covered with cotton and/or wrapped. Let draw and soothe for 36 to 48 hours. Repeat as needed for relief of soreness and swelling. Will not burn or blister skin For abscesses, sprains, strains and bruises For Hooves: Pack the entire sole and frog to draw abscesses or address sole bruising. Cover with a wrap or boot and let draw for 36 to 48 hours. If condition persists or if irritation develops, discontinue use and consult a veterinarian. Caution: Avoid contact with eyes and mucous membranes.