Topical anesthetics (locally used compounds on skin or mouth) when properly applied show a poor or almost nil absorption. Likely, enhanced absorption when apply on damaged or swollen surfaces. Do not apply on the breast. Otherwise, after a breast feed and cleanse it thoroughly with water before next feeding. Creams, gels and other locally applied products that contain paraffin (mineral oil) should be avoided on the nipple in order to keep the infant from absorption of Hydrocarbon derivatives.