Source:http://linkedlifedata.com/resource/umls/id/C0071888
NCI: A brand of combination medications, by Wyeth Pharmaceuticals, used in the treatment of hemorrhoids. Preparation H is used to relieve pain, swelling and pruritis, as well as, to soothe and protect the hemorrhoidal tissue. Preparation H products are formulated as a cream, ointment, cooling gel, suppositories and witch hazel wipes.