Dr. Christopher's - Black Drawing Ointment 2oz. Dr. Christopher's - Black Drawing Ointment is for use externally on old ulcers, tumors, boils, warts, skin cancers, hemorrhoids, excellent for burns and as a healing agent. Dr. Christopher's - Black Drawing Ointment is made with chaparral, comfrey, red clover blossoms, pine tar, mullein, bee's wax, lobelia, golden seal, marshmallow root, plantain, olive oil, mutton tallow, chickweed and poke root. WARNING: External Use Only. Consuming this product can cause serious liver damage. This product contains comfrey. Comfrey contains pyrrolizidine alkaloids, which may cause serious illness or death. This product should not be taken orally, used as a suppository, or applied to broken skin