| Preparation H |
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An active ingredient in some Preparation H prodcts is Phenylephrine in a .25% concentration, a drug which constricts blood vessels. This drug is more commonly used as a decongesteant in cold medications since restricting blood flow in the sinuses will reduce the amount of mucous they create. Since hemorrhoids are caused by inflammed blood vessels, this can reduce their size. Preparation H with hydrocortisone has only hydrocortisone as its active ingredient, in a 1% concentration. A Witch Hazel medicated wipe is also available under the Preparation H brand. The Canadian formulation of Preparation H includes a Yeast Extract called BioDyne which has been removed from the formulation sold in the United States . This yeast extract is believed by many to remove wrinkles from skin and heal dry, cracked, and irritated skin. Thus the Canadian formulation has acquired a market in the United States as a skin cream. In the 1960s Preparation H used the slogan "Effective even in cases of long standing". IN FICTION
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